diff --git a/.github/scripts/get_root_directories.js b/.github/scripts/get_root_directories.js
new file mode 100644
index 0000000..12b10ed
--- /dev/null
+++ b/.github/scripts/get_root_directories.js
@@ -0,0 +1,30 @@
+const axios = require('axios');
+const fs = require('fs');
+
+const PR_NUMBER = process.env.GITHUB_EVENT_PATH ? JSON.parse(fs.readFileSync(process.env.GITHUB_EVENT_PATH, 'utf8')).number : null;
+const REPO = process.env.GITHUB_REPOSITORY;
+const TOKEN = process.env.GITHUB_TOKEN;
+
+console.log(`https://api.github.com/repos/${REPO}/pulls/${PR_NUMBER}/files`);
+
+axios.get(`https://api.github.com/repos/${REPO}/pulls/${PR_NUMBER}/files`, {})
+    .then(response => {
+        const files = response.data;
+        const root_directories = new Set();
+
+        files.forEach(file => {
+            const root_directory = file.filename.split("/")[0];
+            root_directories.add(root_directory);
+        });
+
+        if (root_directories.size > 1) {
+            throw new Error("Multiple root directories changed, action failed.");
+        }
+
+        const root_dir = [...root_directories][0];
+        console.log(`::set-output name=root_directory::${root_dir}`);
+    })
+    .catch(error => {
+        console.error(error.message || 'Error occurred');
+        process.exit(1);
+    });
diff --git a/.github/workflows/check-pr.yml b/.github/workflows/check-pr.yml
index b7000c0..23dfe15 100644
--- a/.github/workflows/check-pr.yml
+++ b/.github/workflows/check-pr.yml
@@ -8,18 +8,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
-    - name: Check for new root directory
+    - name: Install Node.js
+      uses: actions/setup-node@v2
+      with:
+        node-version: '14'
+
+    - name: Install dependencies
       run: |
-        NEW_DIRS=$(git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep '^[^/]\+/$')
-        TOTAL_CHANGES=$(git diff --name-only ${{ github.event.before }} ${{ github.sha }} | wc -l)
-        DIR_COUNT=$(echo "$NEW_DIRS" | wc -l)
-        if [[ -z "$NEW_DIRS" || "$DIR_COUNT" -ne 1 || "$TOTAL_CHANGES" -ne 1 ]]; then
-          echo "PR must contain only one new root directory and no other changes!"
-          exit 1
-        fi
-        echo "New directory: $NEW_DIRS"
+        npm install axios
+
+    - name: Get root directory
+      run: node .github/scripts/get_root_directories.js
+      id: get-dir
 
     - name: Setup Go
       uses: actions/setup-go@v2
@@ -28,5 +30,5 @@ jobs:
 
     - name: Build Go Project in New Directory
       run: |
-        cd $NEW_DIRS
+        cd ${{ steps.get-dir.outputs.root_directory }}
         go build
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..723ef36
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..dcccd85
--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+# backend_2023_freshman_task
+
+2023 杭助后端招新小任务提交仓库
+
+- fork本仓库
+- git clone 你 fork 出来的仓库
+- 在仓库根目录下新建一个和你 github 用户名同名的文件夹
+- 在此文件夹内，放入你的代码
+- 提交 Pull request
+- github action通过后，即为提交成功
\ No newline at end of file