diff --git a/.github/workflows/preview-build.yml b/.github/workflows/preview-build.yml
index c3a632c..3994b6e 100644
--- a/.github/workflows/preview-build.yml
+++ b/.github/workflows/preview-build.yml
@@ -1,4 +1,4 @@
-name: MCT-PreviewBuild
+name: Preview-Build
 
 on:
   push:
@@ -19,6 +19,7 @@ jobs:
         cd build
         cmake --version
         cmake ../
+        echo "Done!"
       shell: sh
     - name: Make build
       run: |
@@ -26,6 +27,7 @@ jobs:
         ls
         cd build
         make
+        echo "Done!"
       shell: sh
     - name: Upload exec file
       uses: actions/upload-artifact@v3.1.2
diff --git a/.gitignore b/.gitignore
index ab24a97..141afa7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .vscode
-build/*
\ No newline at end of file
+build
+
diff --git a/README.md b/README.md
index 1d3e8f2..7693c5f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,6 @@
 
 <div align="center">
 
-[![Download](https://img.shields.io/github/downloads/QuantumLS-Studio/MathCentralTool/total?logo=github&label=Download&style=for-the-badge&color=44cc11)](https://github.com/QuantumLS-Studio/MathCentralTool/releases)
 [![Stars](https://img.shields.io/github/stars/QuantumLS-Studio/MathCentralTool?logo=github&label=Stars&style=for-the-badge)](https://github.com/QuantumLS-Studio/MathCentralTool/stargazers)
 [![License](https://img.shields.io/github/license/QuantumLS-Studio/MathCentralTool?logo=github&label=License&style=for-the-badge&color=ff7a35)](https://github.com/QuantumLS-Studio/MathCentralTool/blob/master/LICENSE)
 [![Issues](https://img.shields.io/github/issues/QuantumLS-Studio/MathCentralTool?logo=github&lable=issues&style=for-the-badge "Issues")](https://github.com/QuantumLS-Studio/MathCentralTool/issues)
@@ -17,8 +16,6 @@
 [![Stable](https://img.shields.io/github/actions/workflow/status/QuantumLS-Studio/MathCentralTool/stable-build.yml?label=Stable&style=for-the-badge "Stable")](https://github.com/QuantumLS-Studio/MathCentralTool/actions/workflows/stable-build.yml)
 [![Preview](https://img.shields.io/github/actions/workflow/status/QuantumLS-Studio/MathCentralTool/preview-build.yml?label=Preview&style=for-the-badge "Preview")](https://github.com/QuantumLS-Studio/MathCentralTool/actions/workflows/preview-build.yml)
 
-![EMAIL](https://img.shields.io/badge/EMAIL-fts427%40outlook.com-4169E1?style=for-the-badge&logoColor=white)
-
 </div>
 
 [🀄简体中文](/README_zh.md)  |  🔠[English](/README.md)
@@ -51,6 +48,9 @@ Thank every developer very much for their help!👍
 
 ## 👀 Other
 
+Change log [change](/change_log.md)
+
 This project also powered by [ECCPH](https://github.com/QuantumLS-Studio/ECCPH)
 
 Old versions[MathCentralTools](https://github.com/FTS427/MathCentralTools)（Archived🗃️）
+
diff --git a/README_zh.md b/README_zh.md
index e630e88..d43748a 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -6,7 +6,6 @@
 
 <div align="center">
 
-[![下载](https://img.shields.io/github/downloads/QuantumLS-Studio/MathCentralTool/total?logo=github&label=下载&style=for-the-badge&color=44cc11)](https://github.com/QuantumLS-Studio/MathCentralTool/releases)
 [![星标](https://img.shields.io/github/stars/QuantumLS-Studio/MathCentralTool?logo=github&label=星标&style=for-the-badge)](https://github.com/QuantumLS-Studio/MathCentralTool/stargazers)
 [![协议](https://img.shields.io/github/license/QuantumLS-Studio/MathCentralTool?logo=github&label=协议&style=for-the-badge&color=ff7a35)](https://github.com/QuantumLS-Studio/MathCentralTool/blob/master/LICENSE)
 [![议题](https://img.shields.io/github/issues/QuantumLS-Studio/MathCentralTool?logo=github&lable=议题&style=for-the-badge "议题")](https://github.com/QuantumLS-Studio/MathCentralTool/issues)
@@ -17,8 +16,6 @@
 [![Stable](https://img.shields.io/github/actions/workflow/status/QuantumLS-Studio/MathCentralTool/stable-build.yml?label=Stable&style=for-the-badge "Stable")](https://github.com/QuantumLS-Studio/MathCentralTool/actions/workflows/stable-build.yml)
 [![Preview](https://img.shields.io/github/actions/workflow/status/QuantumLS-Studio/MathCentralTool/preview-build.yml?label=Preview&style=for-the-badge "Preview")](https://github.com/QuantumLS-Studio/MathCentralTool/actions/workflows/preview-build.yml)
 
-![邮箱](https://img.shields.io/badge/邮箱-fts427%40outlook.com-4169E1?style=for-the-badge&logoColor=white)
-
 </div>
 
 [🀄简体中文](/README_zh.md)  |  [🔠English](/README.md)
@@ -51,6 +48,9 @@
 
 ## 👀其他
 
+之前的更改？在[这里](/change_log.md)
+
 本项目使用了头文件[ECPPH](https://github.com/QuantumLS-Studio/ECPPH)
 
 先前的版本参见[MathCentralTools](https://github.com/FTS427/MathCentralTools)（已归档🗃️）
+
diff --git a/src/include/mhead.h b/src/include/ecp.h
similarity index 100%
rename from src/include/mhead.h
rename to src/include/ecp.h
diff --git a/src/main.cpp b/src/main.cpp
index 49a3739..6b31a63 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,13 +1,13 @@
 //Preview, be careful
 
-#include "./include/mhead.h"
-#include "./part/calc.cpp"
-#include "./part/maxn.cpp"
-#include "./part/minn.cpp"
-#include "./part/chn.cpp"
-#include "./part/cg.cpp"
+#include "./include/ecp.h"
+#include "./plugins/calc.cpp"
+#include "./plugins/maxn.cpp"
+#include "./plugins/minn.cpp"
+#include "./plugins/chn.cpp"
+#include "./plugins/cg.cpp"
 
-//主函数
+// Main function
 int main(){
     clear();
     hy("集成数学工具");
diff --git a/src/part/calc.cpp b/src/plugins/calc.cpp
similarity index 100%
rename from src/part/calc.cpp
rename to src/plugins/calc.cpp
diff --git a/src/part/cg.cpp b/src/plugins/cg.cpp
similarity index 100%
rename from src/part/cg.cpp
rename to src/plugins/cg.cpp
diff --git a/src/part/chn.cpp b/src/plugins/chn.cpp
similarity index 100%
rename from src/part/chn.cpp
rename to src/plugins/chn.cpp
diff --git a/src/part/maxn.cpp b/src/plugins/maxn.cpp
similarity index 100%
rename from src/part/maxn.cpp
rename to src/plugins/maxn.cpp
diff --git a/src/part/minn.cpp b/src/plugins/minn.cpp
similarity index 100%
rename from src/part/minn.cpp
rename to src/plugins/minn.cpp