diff --git a/backend/golang/matrix-middle-service/matrix-middle-service b/backend/golang/matrix-middle-service/matrix-middle-service
new file mode 100644
index 0000000..e066bcb
Binary files /dev/null and b/backend/golang/matrix-middle-service/matrix-middle-service differ
diff --git a/backend/java/.idea/.gitignore b/backend/java/.idea/.gitignore
new file mode 100644
index 0000000..ad38804
--- /dev/null
+++ b/backend/java/.idea/.gitignore
@@ -0,0 +1,10 @@
+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Zeppelin ignored files
+/ZeppelinRemoteNotebooks/
diff --git a/backend/java/.idea/java.iml b/backend/java/.idea/java.iml
new file mode 100644
index 0000000..d6ebd48
--- /dev/null
+++ b/backend/java/.idea/java.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/backend/java/.idea/misc.xml b/backend/java/.idea/misc.xml
new file mode 100644
index 0000000..639900d
--- /dev/null
+++ b/backend/java/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/backend/java/.idea/modules.xml b/backend/java/.idea/modules.xml
new file mode 100644
index 0000000..a127731
--- /dev/null
+++ b/backend/java/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/java.iml" filepath="$PROJECT_DIR$/.idea/java.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/backend/java/.idea/vcs.xml b/backend/java/.idea/vcs.xml
new file mode 100644
index 0000000..b2bdec2
--- /dev/null
+++ b/backend/java/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file