diff --git a/2021/07/04/diagrams.html b/2021/07/04/diagrams.html
index 8c8817b..7d72fe3 100644
--- a/2021/07/04/diagrams.html
+++ b/2021/07/04/diagrams.html
@@ -145,8 +145,8 @@ <h2 id="mermaid">Mermaid</h2>
 </code></pre></div></div>
 
 <div class="jekyll-diagrams diagrams mermaid">
-  <svg id="mermaid-1691403366987" width="100%" xmlns="http://www.w3.org/2000/svg" height="100%" style="max-width:450px;" viewbox="-50 -10 450 231"><style>#mermaid-1691403366987 .label{font-family:trebuchet ms,verdana,arial;color:#333}#mermaid-1691403366987 .node circle,#mermaid-1691403366987 .node ellipse,#mermaid-1691403366987 .node polygon,#mermaid-1691403366987 .node rect{fill:#ececff;stroke:#9370db;stroke-width:1px}#mermaid-1691403366987 .node.clickable{cursor:pointer}#mermaid-1691403366987 .arrowheadPath{fill:#333}#mermaid-1691403366987 .edgePath .path{stroke:#333;stroke-width:1.5px}#mermaid-1691403366987 .edgeLabel{background-color:#e8e8e8}#mermaid-1691403366987 .cluster rect{fill:#ffffde!important;stroke:#aa3!important;stroke-width:1px!important}#mermaid-1691403366987 .cluster text{fill:#333}#mermaid-1691403366987 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:trebuchet ms,verdana,arial;font-size:12px;background:#ffffde;border:1px solid #aa3;border-radius:2px;pointer-events:none;z-index:100}#mermaid-1691403366987 .actor{stroke:#ccf;fill:#ececff}#mermaid-1691403366987 text.actor{fill:#000;stroke:none}#mermaid-1691403366987 .actor-line{stroke:grey}#mermaid-1691403366987 .messageLine0{marker-end:"url(#arrowhead)"}#mermaid-1691403366987 .messageLine0,#mermaid-1691403366987 .messageLine1{stroke-width:1.5;stroke-dasharray:"2 2";stroke:#333}#mermaid-1691403366987 #arrowhead{fill:#333}#mermaid-1691403366987 #crosshead path{fill:#333!important;stroke:#333!important}#mermaid-1691403366987 .messageText{fill:#333;stroke:none}#mermaid-1691403366987 .labelBox{stroke:#ccf;fill:#ececff}#mermaid-1691403366987 .labelText,#mermaid-1691403366987 .loopText{fill:#000;stroke:none}#mermaid-1691403366987 .loopLine{stroke-width:2;stroke-dasharray:"2 2";marker-end:"url(#arrowhead)";stroke:#ccf}#mermaid-1691403366987 .note{stroke:#aa3;fill:#fff5ad}#mermaid-1691403366987 .noteText{fill:#000;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:14px}#mermaid-1691403366987 .section{stroke:none;opacity:.2}#mermaid-1691403366987 .section0{fill:rgba(102,102,255,.49)}#mermaid-1691403366987 .section2{fill:#fff400}#mermaid-1691403366987 .section1,#mermaid-1691403366987 .section3{fill:#fff;opacity:.2}#mermaid-1691403366987 .sectionTitle0,#mermaid-1691403366987 .sectionTitle1,#mermaid-1691403366987 .sectionTitle2,#mermaid-1691403366987 .sectionTitle3{fill:#333}#mermaid-1691403366987 .sectionTitle{text-anchor:start;font-size:11px;text-height:14px}#mermaid-1691403366987 .grid .tick{stroke:#d3d3d3;opacity:.3;shape-rendering:crispEdges}#mermaid-1691403366987 .grid path{stroke-width:0}#mermaid-1691403366987 .today{fill:none;stroke:red;stroke-width:2px}#mermaid-1691403366987 .task{stroke-width:2}#mermaid-1691403366987 .taskText{text-anchor:middle;font-size:11px}#mermaid-1691403366987 .taskTextOutsideRight{fill:#000;text-anchor:start;font-size:11px}#mermaid-1691403366987 .taskTextOutsideLeft{fill:#000;text-anchor:end;font-size:11px}#mermaid-1691403366987 .taskText0,#mermaid-1691403366987 .taskText1,#mermaid-1691403366987 .taskText2,#mermaid-1691403366987 .taskText3{fill:#fff}#mermaid-1691403366987 .task0,#mermaid-1691403366987 .task1,#mermaid-1691403366987 .task2,#mermaid-1691403366987 .task3{fill:#8a90dd;stroke:#534fbc}#mermaid-1691403366987 .taskTextOutside0,#mermaid-1691403366987 .taskTextOutside1,#mermaid-1691403366987 .taskTextOutside2,#mermaid-1691403366987 .taskTextOutside3{fill:#000}#mermaid-1691403366987 .active0,#mermaid-1691403366987 .active1,#mermaid-1691403366987 .active2,#mermaid-1691403366987 .active3{fill:#bfc7ff;stroke:#534fbc}#mermaid-1691403366987 .activeText0,#mermaid-1691403366987 .activeText1,#mermaid-1691403366987 .activeText2,#mermaid-1691403366987 .activeText3{fill:#000!important}#mermaid-1691403366987 .done0,#mermaid-1691403366987 .done1,#mermaid-1691403366987 .done2,#mermaid-1691403366987 .done3{stroke:grey;fill:#d3d3d3;stroke-width:2}#mermaid-1691403366987 .doneText0,#mermaid-1691403366987 .doneText1,#mermaid-1691403366987 .doneText2,#mermaid-1691403366987 .doneText3{fill:#000!important}#mermaid-1691403366987 .crit0,#mermaid-1691403366987 .crit1,#mermaid-1691403366987 .crit2,#mermaid-1691403366987 .crit3{stroke:#f88;fill:red;stroke-width:2}#mermaid-1691403366987 .activeCrit0,#mermaid-1691403366987 .activeCrit1,#mermaid-1691403366987 .activeCrit2,#mermaid-1691403366987 .activeCrit3{stroke:#f88;fill:#bfc7ff;stroke-width:2}#mermaid-1691403366987 .doneCrit0,#mermaid-1691403366987 .doneCrit1,#mermaid-1691403366987 .doneCrit2,#mermaid-1691403366987 .doneCrit3{stroke:#f88;fill:#d3d3d3;stroke-width:2;cursor:pointer;shape-rendering:crispEdges}#mermaid-1691403366987 .activeCritText0,#mermaid-1691403366987 .activeCritText1,#mermaid-1691403366987 .activeCritText2,#mermaid-1691403366987 .activeCritText3,#mermaid-1691403366987 .doneCritText0,#mermaid-1691403366987 .doneCritText1,#mermaid-1691403366987 .doneCritText2,#mermaid-1691403366987 .doneCritText3{fill:#000!important}#mermaid-1691403366987 .titleText{text-anchor:middle;font-size:18px;fill:#000}#mermaid-1691403366987 g.classGroup text{fill:#9370db;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:10px}#mermaid-1691403366987 g.classGroup rect{fill:#ececff;stroke:#9370db}#mermaid-1691403366987 g.classGroup line{stroke:#9370db;stroke-width:1}#mermaid-1691403366987 .classLabel .box{stroke:none;stroke-width:0;fill:#ececff;opacity:.5}#mermaid-1691403366987 .classLabel .label{fill:#9370db;font-size:10px}#mermaid-1691403366987 .relation{stroke:#9370db;stroke-width:1;fill:none}#mermaid-1691403366987 #compositionEnd,#mermaid-1691403366987 #compositionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1691403366987 #aggregationEnd,#mermaid-1691403366987 #aggregationStart{fill:#ececff;stroke:#9370db;stroke-width:1}#mermaid-1691403366987 #dependencyEnd,#mermaid-1691403366987 #dependencyStart,#mermaid-1691403366987 #extensionEnd,#mermaid-1691403366987 #extensionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1691403366987 .branch-label,#mermaid-1691403366987 .commit-id,#mermaid-1691403366987 .commit-msg{fill:#d3d3d3;color:#d3d3d3}</style>
-<style>#mermaid-1691403366987 {
+  <svg id="mermaid-1697015546700" width="100%" xmlns="http://www.w3.org/2000/svg" height="100%" style="max-width:450px;" viewbox="-50 -10 450 231"><style>#mermaid-1697015546700 .label{font-family:trebuchet ms,verdana,arial;color:#333}#mermaid-1697015546700 .node circle,#mermaid-1697015546700 .node ellipse,#mermaid-1697015546700 .node polygon,#mermaid-1697015546700 .node rect{fill:#ececff;stroke:#9370db;stroke-width:1px}#mermaid-1697015546700 .node.clickable{cursor:pointer}#mermaid-1697015546700 .arrowheadPath{fill:#333}#mermaid-1697015546700 .edgePath .path{stroke:#333;stroke-width:1.5px}#mermaid-1697015546700 .edgeLabel{background-color:#e8e8e8}#mermaid-1697015546700 .cluster rect{fill:#ffffde!important;stroke:#aa3!important;stroke-width:1px!important}#mermaid-1697015546700 .cluster text{fill:#333}#mermaid-1697015546700 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:trebuchet ms,verdana,arial;font-size:12px;background:#ffffde;border:1px solid #aa3;border-radius:2px;pointer-events:none;z-index:100}#mermaid-1697015546700 .actor{stroke:#ccf;fill:#ececff}#mermaid-1697015546700 text.actor{fill:#000;stroke:none}#mermaid-1697015546700 .actor-line{stroke:grey}#mermaid-1697015546700 .messageLine0{marker-end:"url(#arrowhead)"}#mermaid-1697015546700 .messageLine0,#mermaid-1697015546700 .messageLine1{stroke-width:1.5;stroke-dasharray:"2 2";stroke:#333}#mermaid-1697015546700 #arrowhead{fill:#333}#mermaid-1697015546700 #crosshead path{fill:#333!important;stroke:#333!important}#mermaid-1697015546700 .messageText{fill:#333;stroke:none}#mermaid-1697015546700 .labelBox{stroke:#ccf;fill:#ececff}#mermaid-1697015546700 .labelText,#mermaid-1697015546700 .loopText{fill:#000;stroke:none}#mermaid-1697015546700 .loopLine{stroke-width:2;stroke-dasharray:"2 2";marker-end:"url(#arrowhead)";stroke:#ccf}#mermaid-1697015546700 .note{stroke:#aa3;fill:#fff5ad}#mermaid-1697015546700 .noteText{fill:#000;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:14px}#mermaid-1697015546700 .section{stroke:none;opacity:.2}#mermaid-1697015546700 .section0{fill:rgba(102,102,255,.49)}#mermaid-1697015546700 .section2{fill:#fff400}#mermaid-1697015546700 .section1,#mermaid-1697015546700 .section3{fill:#fff;opacity:.2}#mermaid-1697015546700 .sectionTitle0,#mermaid-1697015546700 .sectionTitle1,#mermaid-1697015546700 .sectionTitle2,#mermaid-1697015546700 .sectionTitle3{fill:#333}#mermaid-1697015546700 .sectionTitle{text-anchor:start;font-size:11px;text-height:14px}#mermaid-1697015546700 .grid .tick{stroke:#d3d3d3;opacity:.3;shape-rendering:crispEdges}#mermaid-1697015546700 .grid path{stroke-width:0}#mermaid-1697015546700 .today{fill:none;stroke:red;stroke-width:2px}#mermaid-1697015546700 .task{stroke-width:2}#mermaid-1697015546700 .taskText{text-anchor:middle;font-size:11px}#mermaid-1697015546700 .taskTextOutsideRight{fill:#000;text-anchor:start;font-size:11px}#mermaid-1697015546700 .taskTextOutsideLeft{fill:#000;text-anchor:end;font-size:11px}#mermaid-1697015546700 .taskText0,#mermaid-1697015546700 .taskText1,#mermaid-1697015546700 .taskText2,#mermaid-1697015546700 .taskText3{fill:#fff}#mermaid-1697015546700 .task0,#mermaid-1697015546700 .task1,#mermaid-1697015546700 .task2,#mermaid-1697015546700 .task3{fill:#8a90dd;stroke:#534fbc}#mermaid-1697015546700 .taskTextOutside0,#mermaid-1697015546700 .taskTextOutside1,#mermaid-1697015546700 .taskTextOutside2,#mermaid-1697015546700 .taskTextOutside3{fill:#000}#mermaid-1697015546700 .active0,#mermaid-1697015546700 .active1,#mermaid-1697015546700 .active2,#mermaid-1697015546700 .active3{fill:#bfc7ff;stroke:#534fbc}#mermaid-1697015546700 .activeText0,#mermaid-1697015546700 .activeText1,#mermaid-1697015546700 .activeText2,#mermaid-1697015546700 .activeText3{fill:#000!important}#mermaid-1697015546700 .done0,#mermaid-1697015546700 .done1,#mermaid-1697015546700 .done2,#mermaid-1697015546700 .done3{stroke:grey;fill:#d3d3d3;stroke-width:2}#mermaid-1697015546700 .doneText0,#mermaid-1697015546700 .doneText1,#mermaid-1697015546700 .doneText2,#mermaid-1697015546700 .doneText3{fill:#000!important}#mermaid-1697015546700 .crit0,#mermaid-1697015546700 .crit1,#mermaid-1697015546700 .crit2,#mermaid-1697015546700 .crit3{stroke:#f88;fill:red;stroke-width:2}#mermaid-1697015546700 .activeCrit0,#mermaid-1697015546700 .activeCrit1,#mermaid-1697015546700 .activeCrit2,#mermaid-1697015546700 .activeCrit3{stroke:#f88;fill:#bfc7ff;stroke-width:2}#mermaid-1697015546700 .doneCrit0,#mermaid-1697015546700 .doneCrit1,#mermaid-1697015546700 .doneCrit2,#mermaid-1697015546700 .doneCrit3{stroke:#f88;fill:#d3d3d3;stroke-width:2;cursor:pointer;shape-rendering:crispEdges}#mermaid-1697015546700 .activeCritText0,#mermaid-1697015546700 .activeCritText1,#mermaid-1697015546700 .activeCritText2,#mermaid-1697015546700 .activeCritText3,#mermaid-1697015546700 .doneCritText0,#mermaid-1697015546700 .doneCritText1,#mermaid-1697015546700 .doneCritText2,#mermaid-1697015546700 .doneCritText3{fill:#000!important}#mermaid-1697015546700 .titleText{text-anchor:middle;font-size:18px;fill:#000}#mermaid-1697015546700 g.classGroup text{fill:#9370db;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:10px}#mermaid-1697015546700 g.classGroup rect{fill:#ececff;stroke:#9370db}#mermaid-1697015546700 g.classGroup line{stroke:#9370db;stroke-width:1}#mermaid-1697015546700 .classLabel .box{stroke:none;stroke-width:0;fill:#ececff;opacity:.5}#mermaid-1697015546700 .classLabel .label{fill:#9370db;font-size:10px}#mermaid-1697015546700 .relation{stroke:#9370db;stroke-width:1;fill:none}#mermaid-1697015546700 #compositionEnd,#mermaid-1697015546700 #compositionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1697015546700 #aggregationEnd,#mermaid-1697015546700 #aggregationStart{fill:#ececff;stroke:#9370db;stroke-width:1}#mermaid-1697015546700 #dependencyEnd,#mermaid-1697015546700 #dependencyStart,#mermaid-1697015546700 #extensionEnd,#mermaid-1697015546700 #extensionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1697015546700 .branch-label,#mermaid-1697015546700 .commit-id,#mermaid-1697015546700 .commit-msg{fill:#d3d3d3;color:#d3d3d3}</style>
+<style>#mermaid-1697015546700 {
     color: rgb(0, 0, 0);
     font: normal normal 400 normal 16px / normal "Times New Roman";
   }</style>
diff --git a/assets/img/prof_pic-1400.webp b/assets/img/prof_pic-1400.webp
index 8df8b30..d0a8b49 100644
Binary files a/assets/img/prof_pic-1400.webp and b/assets/img/prof_pic-1400.webp differ
diff --git a/assets/img/prof_pic-480.webp b/assets/img/prof_pic-480.webp
index a4d8813..64c75a3 100644
Binary files a/assets/img/prof_pic-480.webp and b/assets/img/prof_pic-480.webp differ
diff --git a/assets/img/prof_pic-800.webp b/assets/img/prof_pic-800.webp
index 8df8b30..d0a8b49 100644
Binary files a/assets/img/prof_pic-800.webp and b/assets/img/prof_pic-800.webp differ
diff --git a/assets/img/prof_pic.jpg b/assets/img/prof_pic.jpg
index c8b045d..3e9bc74 100644
Binary files a/assets/img/prof_pic.jpg and b/assets/img/prof_pic.jpg differ
diff --git a/feed.xml b/feed.xml
index 096639f..7dae975 100644
--- a/feed.xml
+++ b/feed.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en"><generator uri="https://jekyllrb.com/" version="4.3.2">Jekyll</generator><link href="https://kaikaiyao.github.io/feed.xml" rel="self" type="application/atom+xml" /><link href="https://kaikaiyao.github.io/" rel="alternate" type="text/html" hreflang="en" /><updated>2023-08-07T10:15:58+00:00</updated><id>https://kaikaiyao.github.io/feed.xml</id><title type="html">blank</title><subtitle>Personal homepage.
+<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en"><generator uri="https://jekyllrb.com/" version="4.3.2">Jekyll</generator><link href="https://kaikaiyao.github.io/feed.xml" rel="self" type="application/atom+xml" /><link href="https://kaikaiyao.github.io/" rel="alternate" type="text/html" hreflang="en" /><updated>2023-10-11T09:12:17+00:00</updated><id>https://kaikaiyao.github.io/feed.xml</id><title type="html">blank</title><subtitle>Personal homepage.
 </subtitle><entry><title type="html">a post with giscus comments</title><link href="https://kaikaiyao.github.io/sample-posts/external-services/2022/12/10/giscus-comments.html" rel="alternate" type="text/html" title="a post with giscus comments" /><published>2022-12-10T15:59:00+00:00</published><updated>2022-12-10T15:59:00+00:00</updated><id>https://kaikaiyao.github.io/sample-posts/external-services/2022/12/10/giscus-comments</id><content type="html" xml:base="https://kaikaiyao.github.io/sample-posts/external-services/2022/12/10/giscus-comments.html"><![CDATA[<p>This post shows how to add GISCUS comments.</p>]]></content><author><name></name></author><category term="sample-posts" /><category term="external-services" /><summary type="html"><![CDATA[an example of a blog post with giscus comments]]></summary></entry><entry><title type="html">a post with redirect</title><link href="https://kaikaiyao.github.io/2022/02/01/redirect.html" rel="alternate" type="text/html" title="a post with redirect" /><published>2022-02-01T17:39:00+00:00</published><updated>2022-02-01T17:39:00+00:00</updated><id>https://kaikaiyao.github.io/2022/02/01/redirect</id><content type="html" xml:base="https://kaikaiyao.github.io/2022/02/01/redirect.html"><![CDATA[<p>Redirecting to another page.</p>]]></content><author><name></name></author><summary type="html"><![CDATA[you can also redirect to assets like pdf]]></summary></entry><entry><title type="html">a post with diagrams</title><link href="https://kaikaiyao.github.io/2021/07/04/diagrams.html" rel="alternate" type="text/html" title="a post with diagrams" /><published>2021-07-04T17:39:00+00:00</published><updated>2021-07-04T17:39:00+00:00</updated><id>https://kaikaiyao.github.io/2021/07/04/diagrams</id><content type="html" xml:base="https://kaikaiyao.github.io/2021/07/04/diagrams.html"><![CDATA[<p>This theme supports generating various diagrams from a text description using <a href="https://github.com/zhustec/jekyll-diagrams" target="\_blank">jekyll-diagrams</a> plugin.
 Below, we generate a few examples of such diagrams using languages such as <a href="https://mermaid-js.github.io/mermaid/" target="\_blank">mermaid</a>, <a href="https://plantuml.com/" target="\_blank">plantuml</a>, <a href="https://vega.github.io/vega-lite/" target="\_blank">vega-lite</a>, etc.</p>
 
@@ -24,7 +24,7 @@ sequenceDiagram
 </code></pre></div></div>
 
 <div class="jekyll-diagrams diagrams mermaid">
-  <svg id="mermaid-1691403366987" width="100%" xmlns="http://www.w3.org/2000/svg" height="100%" style="max-width:450px;" viewBox="-50 -10 450 231"><style>#mermaid-1691403366987 .label{font-family:trebuchet ms,verdana,arial;color:#333}#mermaid-1691403366987 .node circle,#mermaid-1691403366987 .node ellipse,#mermaid-1691403366987 .node polygon,#mermaid-1691403366987 .node rect{fill:#ececff;stroke:#9370db;stroke-width:1px}#mermaid-1691403366987 .node.clickable{cursor:pointer}#mermaid-1691403366987 .arrowheadPath{fill:#333}#mermaid-1691403366987 .edgePath .path{stroke:#333;stroke-width:1.5px}#mermaid-1691403366987 .edgeLabel{background-color:#e8e8e8}#mermaid-1691403366987 .cluster rect{fill:#ffffde!important;stroke:#aa3!important;stroke-width:1px!important}#mermaid-1691403366987 .cluster text{fill:#333}#mermaid-1691403366987 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:trebuchet ms,verdana,arial;font-size:12px;background:#ffffde;border:1px solid #aa3;border-radius:2px;pointer-events:none;z-index:100}#mermaid-1691403366987 .actor{stroke:#ccf;fill:#ececff}#mermaid-1691403366987 text.actor{fill:#000;stroke:none}#mermaid-1691403366987 .actor-line{stroke:grey}#mermaid-1691403366987 .messageLine0{marker-end:"url(#arrowhead)"}#mermaid-1691403366987 .messageLine0,#mermaid-1691403366987 .messageLine1{stroke-width:1.5;stroke-dasharray:"2 2";stroke:#333}#mermaid-1691403366987 #arrowhead{fill:#333}#mermaid-1691403366987 #crosshead path{fill:#333!important;stroke:#333!important}#mermaid-1691403366987 .messageText{fill:#333;stroke:none}#mermaid-1691403366987 .labelBox{stroke:#ccf;fill:#ececff}#mermaid-1691403366987 .labelText,#mermaid-1691403366987 .loopText{fill:#000;stroke:none}#mermaid-1691403366987 .loopLine{stroke-width:2;stroke-dasharray:"2 2";marker-end:"url(#arrowhead)";stroke:#ccf}#mermaid-1691403366987 .note{stroke:#aa3;fill:#fff5ad}#mermaid-1691403366987 .noteText{fill:#000;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:14px}#mermaid-1691403366987 .section{stroke:none;opacity:.2}#mermaid-1691403366987 .section0{fill:rgba(102,102,255,.49)}#mermaid-1691403366987 .section2{fill:#fff400}#mermaid-1691403366987 .section1,#mermaid-1691403366987 .section3{fill:#fff;opacity:.2}#mermaid-1691403366987 .sectionTitle0,#mermaid-1691403366987 .sectionTitle1,#mermaid-1691403366987 .sectionTitle2,#mermaid-1691403366987 .sectionTitle3{fill:#333}#mermaid-1691403366987 .sectionTitle{text-anchor:start;font-size:11px;text-height:14px}#mermaid-1691403366987 .grid .tick{stroke:#d3d3d3;opacity:.3;shape-rendering:crispEdges}#mermaid-1691403366987 .grid path{stroke-width:0}#mermaid-1691403366987 .today{fill:none;stroke:red;stroke-width:2px}#mermaid-1691403366987 .task{stroke-width:2}#mermaid-1691403366987 .taskText{text-anchor:middle;font-size:11px}#mermaid-1691403366987 .taskTextOutsideRight{fill:#000;text-anchor:start;font-size:11px}#mermaid-1691403366987 .taskTextOutsideLeft{fill:#000;text-anchor:end;font-size:11px}#mermaid-1691403366987 .taskText0,#mermaid-1691403366987 .taskText1,#mermaid-1691403366987 .taskText2,#mermaid-1691403366987 .taskText3{fill:#fff}#mermaid-1691403366987 .task0,#mermaid-1691403366987 .task1,#mermaid-1691403366987 .task2,#mermaid-1691403366987 .task3{fill:#8a90dd;stroke:#534fbc}#mermaid-1691403366987 .taskTextOutside0,#mermaid-1691403366987 .taskTextOutside1,#mermaid-1691403366987 .taskTextOutside2,#mermaid-1691403366987 .taskTextOutside3{fill:#000}#mermaid-1691403366987 .active0,#mermaid-1691403366987 .active1,#mermaid-1691403366987 .active2,#mermaid-1691403366987 .active3{fill:#bfc7ff;stroke:#534fbc}#mermaid-1691403366987 .activeText0,#mermaid-1691403366987 .activeText1,#mermaid-1691403366987 .activeText2,#mermaid-1691403366987 .activeText3{fill:#000!important}#mermaid-1691403366987 .done0,#mermaid-1691403366987 .done1,#mermaid-1691403366987 .done2,#mermaid-1691403366987 .done3{stroke:grey;fill:#d3d3d3;stroke-width:2}#mermaid-1691403366987 .doneText0,#mermaid-1691403366987 .doneText1,#mermaid-1691403366987 .doneText2,#mermaid-1691403366987 .doneText3{fill:#000!important}#mermaid-1691403366987 .crit0,#mermaid-1691403366987 .crit1,#mermaid-1691403366987 .crit2,#mermaid-1691403366987 .crit3{stroke:#f88;fill:red;stroke-width:2}#mermaid-1691403366987 .activeCrit0,#mermaid-1691403366987 .activeCrit1,#mermaid-1691403366987 .activeCrit2,#mermaid-1691403366987 .activeCrit3{stroke:#f88;fill:#bfc7ff;stroke-width:2}#mermaid-1691403366987 .doneCrit0,#mermaid-1691403366987 .doneCrit1,#mermaid-1691403366987 .doneCrit2,#mermaid-1691403366987 .doneCrit3{stroke:#f88;fill:#d3d3d3;stroke-width:2;cursor:pointer;shape-rendering:crispEdges}#mermaid-1691403366987 .activeCritText0,#mermaid-1691403366987 .activeCritText1,#mermaid-1691403366987 .activeCritText2,#mermaid-1691403366987 .activeCritText3,#mermaid-1691403366987 .doneCritText0,#mermaid-1691403366987 .doneCritText1,#mermaid-1691403366987 .doneCritText2,#mermaid-1691403366987 .doneCritText3{fill:#000!important}#mermaid-1691403366987 .titleText{text-anchor:middle;font-size:18px;fill:#000}#mermaid-1691403366987 g.classGroup text{fill:#9370db;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:10px}#mermaid-1691403366987 g.classGroup rect{fill:#ececff;stroke:#9370db}#mermaid-1691403366987 g.classGroup line{stroke:#9370db;stroke-width:1}#mermaid-1691403366987 .classLabel .box{stroke:none;stroke-width:0;fill:#ececff;opacity:.5}#mermaid-1691403366987 .classLabel .label{fill:#9370db;font-size:10px}#mermaid-1691403366987 .relation{stroke:#9370db;stroke-width:1;fill:none}#mermaid-1691403366987 #compositionEnd,#mermaid-1691403366987 #compositionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1691403366987 #aggregationEnd,#mermaid-1691403366987 #aggregationStart{fill:#ececff;stroke:#9370db;stroke-width:1}#mermaid-1691403366987 #dependencyEnd,#mermaid-1691403366987 #dependencyStart,#mermaid-1691403366987 #extensionEnd,#mermaid-1691403366987 #extensionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1691403366987 .branch-label,#mermaid-1691403366987 .commit-id,#mermaid-1691403366987 .commit-msg{fill:#d3d3d3;color:#d3d3d3}</style><style>#mermaid-1691403366987 {
+  <svg id="mermaid-1697015546700" width="100%" xmlns="http://www.w3.org/2000/svg" height="100%" style="max-width:450px;" viewBox="-50 -10 450 231"><style>#mermaid-1697015546700 .label{font-family:trebuchet ms,verdana,arial;color:#333}#mermaid-1697015546700 .node circle,#mermaid-1697015546700 .node ellipse,#mermaid-1697015546700 .node polygon,#mermaid-1697015546700 .node rect{fill:#ececff;stroke:#9370db;stroke-width:1px}#mermaid-1697015546700 .node.clickable{cursor:pointer}#mermaid-1697015546700 .arrowheadPath{fill:#333}#mermaid-1697015546700 .edgePath .path{stroke:#333;stroke-width:1.5px}#mermaid-1697015546700 .edgeLabel{background-color:#e8e8e8}#mermaid-1697015546700 .cluster rect{fill:#ffffde!important;stroke:#aa3!important;stroke-width:1px!important}#mermaid-1697015546700 .cluster text{fill:#333}#mermaid-1697015546700 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:trebuchet ms,verdana,arial;font-size:12px;background:#ffffde;border:1px solid #aa3;border-radius:2px;pointer-events:none;z-index:100}#mermaid-1697015546700 .actor{stroke:#ccf;fill:#ececff}#mermaid-1697015546700 text.actor{fill:#000;stroke:none}#mermaid-1697015546700 .actor-line{stroke:grey}#mermaid-1697015546700 .messageLine0{marker-end:"url(#arrowhead)"}#mermaid-1697015546700 .messageLine0,#mermaid-1697015546700 .messageLine1{stroke-width:1.5;stroke-dasharray:"2 2";stroke:#333}#mermaid-1697015546700 #arrowhead{fill:#333}#mermaid-1697015546700 #crosshead path{fill:#333!important;stroke:#333!important}#mermaid-1697015546700 .messageText{fill:#333;stroke:none}#mermaid-1697015546700 .labelBox{stroke:#ccf;fill:#ececff}#mermaid-1697015546700 .labelText,#mermaid-1697015546700 .loopText{fill:#000;stroke:none}#mermaid-1697015546700 .loopLine{stroke-width:2;stroke-dasharray:"2 2";marker-end:"url(#arrowhead)";stroke:#ccf}#mermaid-1697015546700 .note{stroke:#aa3;fill:#fff5ad}#mermaid-1697015546700 .noteText{fill:#000;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:14px}#mermaid-1697015546700 .section{stroke:none;opacity:.2}#mermaid-1697015546700 .section0{fill:rgba(102,102,255,.49)}#mermaid-1697015546700 .section2{fill:#fff400}#mermaid-1697015546700 .section1,#mermaid-1697015546700 .section3{fill:#fff;opacity:.2}#mermaid-1697015546700 .sectionTitle0,#mermaid-1697015546700 .sectionTitle1,#mermaid-1697015546700 .sectionTitle2,#mermaid-1697015546700 .sectionTitle3{fill:#333}#mermaid-1697015546700 .sectionTitle{text-anchor:start;font-size:11px;text-height:14px}#mermaid-1697015546700 .grid .tick{stroke:#d3d3d3;opacity:.3;shape-rendering:crispEdges}#mermaid-1697015546700 .grid path{stroke-width:0}#mermaid-1697015546700 .today{fill:none;stroke:red;stroke-width:2px}#mermaid-1697015546700 .task{stroke-width:2}#mermaid-1697015546700 .taskText{text-anchor:middle;font-size:11px}#mermaid-1697015546700 .taskTextOutsideRight{fill:#000;text-anchor:start;font-size:11px}#mermaid-1697015546700 .taskTextOutsideLeft{fill:#000;text-anchor:end;font-size:11px}#mermaid-1697015546700 .taskText0,#mermaid-1697015546700 .taskText1,#mermaid-1697015546700 .taskText2,#mermaid-1697015546700 .taskText3{fill:#fff}#mermaid-1697015546700 .task0,#mermaid-1697015546700 .task1,#mermaid-1697015546700 .task2,#mermaid-1697015546700 .task3{fill:#8a90dd;stroke:#534fbc}#mermaid-1697015546700 .taskTextOutside0,#mermaid-1697015546700 .taskTextOutside1,#mermaid-1697015546700 .taskTextOutside2,#mermaid-1697015546700 .taskTextOutside3{fill:#000}#mermaid-1697015546700 .active0,#mermaid-1697015546700 .active1,#mermaid-1697015546700 .active2,#mermaid-1697015546700 .active3{fill:#bfc7ff;stroke:#534fbc}#mermaid-1697015546700 .activeText0,#mermaid-1697015546700 .activeText1,#mermaid-1697015546700 .activeText2,#mermaid-1697015546700 .activeText3{fill:#000!important}#mermaid-1697015546700 .done0,#mermaid-1697015546700 .done1,#mermaid-1697015546700 .done2,#mermaid-1697015546700 .done3{stroke:grey;fill:#d3d3d3;stroke-width:2}#mermaid-1697015546700 .doneText0,#mermaid-1697015546700 .doneText1,#mermaid-1697015546700 .doneText2,#mermaid-1697015546700 .doneText3{fill:#000!important}#mermaid-1697015546700 .crit0,#mermaid-1697015546700 .crit1,#mermaid-1697015546700 .crit2,#mermaid-1697015546700 .crit3{stroke:#f88;fill:red;stroke-width:2}#mermaid-1697015546700 .activeCrit0,#mermaid-1697015546700 .activeCrit1,#mermaid-1697015546700 .activeCrit2,#mermaid-1697015546700 .activeCrit3{stroke:#f88;fill:#bfc7ff;stroke-width:2}#mermaid-1697015546700 .doneCrit0,#mermaid-1697015546700 .doneCrit1,#mermaid-1697015546700 .doneCrit2,#mermaid-1697015546700 .doneCrit3{stroke:#f88;fill:#d3d3d3;stroke-width:2;cursor:pointer;shape-rendering:crispEdges}#mermaid-1697015546700 .activeCritText0,#mermaid-1697015546700 .activeCritText1,#mermaid-1697015546700 .activeCritText2,#mermaid-1697015546700 .activeCritText3,#mermaid-1697015546700 .doneCritText0,#mermaid-1697015546700 .doneCritText1,#mermaid-1697015546700 .doneCritText2,#mermaid-1697015546700 .doneCritText3{fill:#000!important}#mermaid-1697015546700 .titleText{text-anchor:middle;font-size:18px;fill:#000}#mermaid-1697015546700 g.classGroup text{fill:#9370db;stroke:none;font-family:trebuchet ms,verdana,arial;font-size:10px}#mermaid-1697015546700 g.classGroup rect{fill:#ececff;stroke:#9370db}#mermaid-1697015546700 g.classGroup line{stroke:#9370db;stroke-width:1}#mermaid-1697015546700 .classLabel .box{stroke:none;stroke-width:0;fill:#ececff;opacity:.5}#mermaid-1697015546700 .classLabel .label{fill:#9370db;font-size:10px}#mermaid-1697015546700 .relation{stroke:#9370db;stroke-width:1;fill:none}#mermaid-1697015546700 #compositionEnd,#mermaid-1697015546700 #compositionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1697015546700 #aggregationEnd,#mermaid-1697015546700 #aggregationStart{fill:#ececff;stroke:#9370db;stroke-width:1}#mermaid-1697015546700 #dependencyEnd,#mermaid-1697015546700 #dependencyStart,#mermaid-1697015546700 #extensionEnd,#mermaid-1697015546700 #extensionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-1697015546700 .branch-label,#mermaid-1697015546700 .commit-id,#mermaid-1697015546700 .commit-msg{fill:#d3d3d3;color:#d3d3d3}</style><style>#mermaid-1697015546700 {
     color: rgb(0, 0, 0);
     font: normal normal 400 normal 16px / normal "Times New Roman";
   }</style><g></g><g><line id="actor0" x1="75" y1="5" x2="75" y2="220" class="actor-line" stroke-width="0.5px" stroke="#999"></line><rect x="0" y="0" fill="#eaeaea" stroke="#666" width="150" height="65" rx="3" ry="3" class="actor"></rect><text x="75" y="32.5" dominant-baseline="central" alignment-baseline="central" class="actor" style="text-anchor: middle;"><tspan x="75" dy="0">John</tspan></text></g><g><line id="actor1" x1="275" y1="5" x2="275" y2="220" class="actor-line" stroke-width="0.5px" stroke="#999"></line><rect x="200" y="0" fill="#eaeaea" stroke="#666" width="150" height="65" rx="3" ry="3" class="actor"></rect><text x="275" y="32.5" dominant-baseline="central" alignment-baseline="central" class="actor" style="text-anchor: middle;"><tspan x="275" dy="0">Alice</tspan></text></g><defs><marker id="arrowhead" refX="5" refY="2" markerWidth="6" markerHeight="4" orient="auto"><path d="M 0,0 V 4 L6,2 Z"></path></marker></defs><defs><marker id="crosshead" markerWidth="15" markerHeight="8" orient="auto" refX="16" refY="4"><path fill="black" stroke="#000000" stroke-width="1px" d="M 9,2 V 6 L16,4 Z" style="stroke-dasharray: 0, 0;"></path><path fill="none" stroke="#000000" stroke-width="1px" d="M 0,1 L 6,7 M 6,1 L 0,7" style="stroke-dasharray: 0, 0;"></path></marker></defs><g><text x="175" y="93" class="messageText" style="text-anchor: middle;">Hello John, how are you?</text><line x1="275" y1="100" x2="75" y2="100" class="messageLine0" stroke-width="2" stroke="black" marker-end="url(#arrowhead)" style="fill: none;"></line></g><g><text x="175" y="128" class="messageText" style="text-anchor: middle;">Great!</text><line x1="75" y1="135" x2="275" y2="135" class="messageLine1" stroke-width="2" stroke="black" marker-end="url(#arrowhead)" style="stroke-dasharray: 3, 3; fill: none;"></line></g><g><rect x="0" y="155" fill="#eaeaea" stroke="#666" width="150" height="65" rx="3" ry="3" class="actor"></rect><text x="75" y="187.5" dominant-baseline="central" alignment-baseline="central" class="actor" style="text-anchor: middle;"><tspan x="75" dy="0">John</tspan></text></g><g><rect x="200" y="155" fill="#eaeaea" stroke="#666" width="150" height="65" rx="3" ry="3" class="actor"></rect><text x="275" y="187.5" dominant-baseline="central" alignment-baseline="central" class="actor" style="text-anchor: middle;"><tspan x="275" dy="0">Alice</tspan></text></g></svg>
diff --git a/sitemap.xml b/sitemap.xml
index a7b4223..314e1ab 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -58,27 +58,27 @@
 </url>
 <url>
 <loc>https://kaikaiyao.github.io/projects/1_project/</loc>
-<lastmod>2023-08-07T10:15:58+00:00</lastmod>
+<lastmod>2023-10-11T09:12:17+00:00</lastmod>
 </url>
 <url>
 <loc>https://kaikaiyao.github.io/projects/2_project/</loc>
-<lastmod>2023-08-07T10:15:58+00:00</lastmod>
+<lastmod>2023-10-11T09:12:17+00:00</lastmod>
 </url>
 <url>
 <loc>https://kaikaiyao.github.io/projects/3_project/</loc>
-<lastmod>2023-08-07T10:15:58+00:00</lastmod>
+<lastmod>2023-10-11T09:12:17+00:00</lastmod>
 </url>
 <url>
 <loc>https://kaikaiyao.github.io/projects/4_project/</loc>
-<lastmod>2023-08-07T10:15:58+00:00</lastmod>
+<lastmod>2023-10-11T09:12:17+00:00</lastmod>
 </url>
 <url>
 <loc>https://kaikaiyao.github.io/projects/5_project/</loc>
-<lastmod>2023-08-07T10:15:58+00:00</lastmod>
+<lastmod>2023-10-11T09:12:17+00:00</lastmod>
 </url>
 <url>
 <loc>https://kaikaiyao.github.io/projects/6_project/</loc>
-<lastmod>2023-08-07T10:15:58+00:00</lastmod>
+<lastmod>2023-10-11T09:12:17+00:00</lastmod>
 </url>
 <url>
 <loc>https://kaikaiyao.github.io/</loc>