diff --git a/.gitignore b/.gitignore
index e235f0f..f73d91d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-
+
 ## Ignore custom items
 out/
 
@@ -62,6 +62,7 @@ install_manifest.txt
 compile_commands.json
 CTestTestfile.cmake
 _deps
+build
 
 ## Ignore items for CLion
 .idea/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9dad2f1..d39deea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,4 @@
-#
-# Created by Dynesshely on 2023.02.05.
-# Changed by ChenPi11 on 2023.03.05.
-# Changed by Dynesshely on 2023.04.17
-#
-
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.6)
 
 project(CppEnhanced)
 
@@ -14,7 +8,6 @@ file(GLOB SOURCE_FILES "${CMAKE_CURRENT_SOURCE_DIR}/source/*.cpp")
 
 include_directories(
     ${CMAKE_CURRENT_SOURCE_DIR}/include
-    ${CMAKE_CURRENT_SOURCE_DIR}/public
 )
 
 add_library(CppEnhanced SHARED ${SOURCE_FILES})
diff --git a/README.md b/README.md
index b0b79a7..034c079 100644
--- a/README.md
+++ b/README.md
@@ -7,51 +7,18 @@ In future, you will be able to import CppEnhanced from vcpkg and other package m
 
 # Build
 
-## Get source codes
+## Dependencies
 
-```shell
-git clone git@github.com:Dynesshely/CppEnhanced.git
-```
-
-## On Linux, Unix, Cygwin, MacOS or other unix-like OS
-
-Prepare CMake, C++ compiler and other tool chain first.
-
-```shell
-# Way 1 (Recommended)
-./build.sh
-
-# Way 2 (Manually)
-mkdir build
-cd build
-cmake ..
-make
-cd ..
-```
-
-## On Windows (build with MSVC)
++ CMake. ( Version > 3.6 )
++ C/C++ build toolchains.
 
-Make sure CMake and MSVC environment installed.
+## Command
 
 ```shell
-# You need execute commands in `Developer PowerShell for VS`
-# So that path of `MSBuild.exe` can be located
-# You can also query path of `MSBuild.exe` by following command
-
-# Way 1 (Recommended)
-./build.ps1
-
-# Way 2 (Manually)
 mkdir build
 cd build
 cmake ..
-msbuild ./ALL_BUILD.vcxproj
-cd ..
-```
-
-You can also query path of `MSBuild.exe` by following command:
-```cmd
-reg.exe query "HKLM\SOFTWARE\Microsoft\MSBuild\ToolsVersions\4.0" /v MSBuildToolsPath
+cmake --build . --config=Release
 ```
 
 # Components
diff --git a/build.ps1 b/build.ps1
deleted file mode 100644
index 752fe22..0000000
--- a/build.ps1
+++ /dev/null
@@ -1,12 +0,0 @@
-
-# $query = (reg.exe query "HKLM\SOFTWARE\Microsoft\MSBuild\ToolsVersions\4.0" /v MSBuildToolsPath)
-# $match = $query -match 'C:\\\S*'
-# $path = $match -replace 'MSBuildToolsPath','' -replace 'REG_SZ','' -replace ' ',''
-
-mkdir build
-cd build
-cmake ..
-# & "${path}MSBuild.exe" ./ALL_BUILD.vcxproj
-msbuild ./ALL_BUILD.vcxproj
-cd ..
-
diff --git a/build.sh b/build.sh
deleted file mode 100755
index 596357f..0000000
--- a/build.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-mkdir build
-cd build
-cmake ..
-make
-cd ..
diff --git a/clean.ps1 b/clean.ps1
deleted file mode 100644
index 37ca268..0000000
--- a/clean.ps1
+++ /dev/null
@@ -1 +0,0 @@
-rm build -Force
\ No newline at end of file
diff --git a/clean.sh b/clean.sh
deleted file mode 100755
index 07cbd15..0000000
--- a/clean.sh
+++ /dev/null
@@ -1 +0,0 @@
-rm -r build
diff --git a/include/cppfecs.hpp b/include/cppfecs.hpp
index df8bd47..23dd967 100644
--- a/include/cppfecs.hpp
+++ b/include/cppfecs.hpp
@@ -1,4 +1,4 @@
-#ifndef _INC_STDCPP_FECS_HPP_
+#ifndef _INC_STDCPP_FECS_HPP_
 #define _INC_STDCPP_FECS_HPP_
 #include "libplatform.h"
 
diff --git a/include/datetime.hpp b/include/datetime.hpp
index e5a566d..bece104 100644
--- a/include/datetime.hpp
+++ b/include/datetime.hpp
@@ -1,9 +1,3 @@
-//
-// Created by Dynesshely on 2023.02.05
-// Changed by ChenPi11 on 2023.03.05
-// Changed by Dynesshely on 2023.04.17
-//
-
 #ifndef CPPENHANCED_DATETIME_H
 #define CPPENHANCED_DATETIME_H
 
@@ -168,9 +162,9 @@ namespace CppEnhanced {
 
         std::string ToString(int type, char d = '.', char t = ':') const;
 
-        std::string ToString(std::string format) const;
+        std::string ToString(const std::string& format) const;
 
-        std::wstring ToString(std::wstring format) const;
+        std::wstring ToString(const std::wstring& format) const;
 
         bool Validate() noexcept;
 
diff --git a/public/stdc++.h b/public/stdc++.h
deleted file mode 100644
index 033a3b0..0000000
--- a/public/stdc++.h
+++ /dev/null
@@ -1,117 +0,0 @@
-// C++ includes used for precompiling -*- C++ -*-
-
-// Copyright (C) 2003-2013 Free Software Foundation, Inc.
-//
-// This file is part of the GNU ISO C++ Library.  This library is free
-// software; you can redistribute it and/or modify it under the
-// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 3, or (at your option)
-// any later version.
-
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// Under Section 7 of GPL version 3, you are granted additional
-// permissions described in the GCC Runtime Library Exception, version
-// 3.1, as published by the Free Software Foundation.
-
-// You should have received a copy of the GNU General Public License and
-// a copy of the GCC Runtime Library Exception along with this program;
-// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
-// <Licenses - GNU Project - Free Software Foundation>.
-
-/** @file stdc++.h
- *  This is an implementation file for a precompiled header.
- */
-
- // 17.4.1.2 Headers
-
- // C
-#ifndef _GLIBCXX_NO_ASSERT
-#include <cassert>
-#endif
-#include <cctype>
-#include <cerrno>
-#include <cfloat>
-#include <ciso646>
-#include <climits>
-#include <clocale>
-#include <cmath>
-#include <csetjmp>
-#include <csignal>
-#include <cstdarg>
-#include <cstddef>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-
-#if __cplusplus >= 201103L
-#include <ccomplex>
-#include <cfenv>
-#include <cinttypes>
-#include <cstdalign>
-#include <cstdbool>
-#include <cstdint>
-#include <ctgmath>
-#include <cwchar>
-#include <cwctype>
-#endif
-
-// C++
-#include <algorithm>
-#include <bitset>
-#include <complex>
-#include <deque>
-#include <exception>
-#include <fstream>
-#include <functional>
-#include <iomanip>
-#include <ios>
-#include <iosfwd>
-#include <iostream>
-#include <istream>
-#include <iterator>
-#include <limits>
-#include <list>
-#include <locale>
-#include <map>
-#include <memory>
-#include <new>
-#include <numeric>
-#include <ostream>
-#include <queue>
-#include <set>
-#include <sstream>
-#include <stack>
-#include <stdexcept>
-#include <streambuf>
-#include <string>
-#include <typeinfo>
-#include <utility>
-#include <valarray>
-#include <vector>
-
-#if __cplusplus >= 201103L
-#include <array>
-#include <atomic>
-#include <chrono>
-#include <condition_variable>
-#include <forward_list>
-#include <future>
-#include <initializer_list>
-#include <mutex>
-#include <random>
-#include <ratio>
-#include <regex>
-#include <scoped_allocator>
-#include <system_error>
-#include <thread>
-#include <tuple>
-#include <typeindex>
-#include <type_traits>
-#include <unordered_map>
-#include <unordered_set>
-#endif
\ No newline at end of file
diff --git a/source/datetime.cpp b/source/datetime.cpp
index 28c8a78..f913ba4 100644
--- a/source/datetime.cpp
+++ b/source/datetime.cpp
@@ -1,9 +1,3 @@
-//
-// Created by Dynesshely on 2023.02.05
-// Changed by ChenPi11 on 2023.03.05
-// Changed by Dynesshely on 2023.04.17
-//
-
 #include <datetime.hpp>
 
 namespace CppEnhanced {
@@ -129,14 +123,14 @@ namespace CppEnhanced {
         return _pub_osstream.str();
     }
 
-    std::string DateTime::ToString(std::string format) const {
+    std::string DateTime::ToString(const std::string& format) const {
 
         // Todo: to string
 
         return std::string("");
     }
 
-    std::wstring DateTime::ToString(std::wstring format) const {
+    std::wstring DateTime::ToString(const std::wstring& format) const {
 
         // Todo: to wstring
 
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 1693f25..fd16eaa 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,4 +1,4 @@
-
+
 set(TEST_SOURCES
     test_datetime.cpp
 )
diff --git a/tests/test_datetime.cpp b/tests/test_datetime.cpp
index 3ce986c..94132b7 100644
--- a/tests/test_datetime.cpp
+++ b/tests/test_datetime.cpp
@@ -1,4 +1,4 @@
-
+
 #include <datetime.hpp>
 #include <stdio.h>