diff --git a/mac-homebrew-install.sh b/mac-homebrew-install.sh
index 81943c6..81f446c 100644
--- a/mac-homebrew-install.sh
+++ b/mac-homebrew-install.sh
@@ -4,6 +4,8 @@ echo "Installing Homebrew on MacOS"
 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
 # default brew path: /opt/homebrew for Apple Silicon, /usr/local/Homebrew for macOS Intel and /home/linuxbrew/.linuxbrew for Linux
 
+echo "if `brew --repo homebrew/core` not exists, you may need to git clone https://github.com/Homebrew/homebrew-core.git as well as for homebrew-cask"
+
 # add brew to path on Apple Silicon:
 # (echo; echo 'eval "$(/opt/homebrew/bin/brew shellenv)"') >> /Users/luk/.bash_profile
 # eval "$(/opt/homebrew/bin/brew shellenv)"
@@ -18,4 +20,4 @@ echo "Installing Homebrew on MacOS"
 
 # uninstall: https://github.com/homebrew/install#uninstall-homebrew
 #   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"
-# install emacs: brew cask install emacs
+
diff --git a/mac-homebrew-china.sh b/mac-homebrew-mirror.sh
similarity index 72%
rename from mac-homebrew-china.sh
rename to mac-homebrew-mirror.sh
index 594d54c..5f963a7 100644
--- a/mac-homebrew-china.sh
+++ b/mac-homebrew-mirror.sh
@@ -4,25 +4,25 @@ read -p '>>> ' TARGET
 if [ "$TARGET" = 'g' ]
 then
   git -C "$(brew --repo)" remote set-url origin https://github.com/Homebrew/brew.git
-  git -C "$(brew --repo homebrew-core)" remote set-url origin https://github.com/Homebrew/homebrew-core.git
-  git -C "$(brew --repo homebrew-cask)" remote set-url origin https://github.com/Homebrew/homebrew-cask
+  git -C "$(brew --repo homebrew/core)" remote set-url origin https://github.com/Homebrew/homebrew-core.git
+  git -C "$(brew --repo homebrew/cask)" remote set-url origin https://github.com/Homebrew/homebrew-cask
 elif [ "$TARGET" = 'z' ]
 then
   git -C "$(brew --repo)" remote set-url origin https://mirrors.ustc.edu.cn/brew.git 
-  git -C "$(brew --repo homebrew-core)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git 
-  git -C "$(brew --repo homebrew-cask)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-cask.git
+  git -C "$(brew --repo homebrew/core)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git 
+  git -C "$(brew --repo homebrew/cask)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-cask.git
   export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles
 elif [ "$TARGET" = 'q' ]
 then
   git -C "$(brew --repo)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git 
-  git -C "$(brew --repo homebrew-core)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git 
-  git -C "$(brew --repo homebrew-cask)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-cask.git
+  git -C "$(brew --repo homebrew/core)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git 
+  git -C "$(brew --repo homebrew/cask)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-cask.git
   export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.tuna.tsinghua.edu.cn/homebrew-bottles
 elif [ "$TARGET" = 'a' ]
 then
   git -C "$(brew --repo)" remote set-url origin https://mirrors.aliyun.com/homebrew/brew.git 
-  git -C "$(brew --repo homebrew-core)" remote set-url origin https://mirrors.aliyun.com/homebrew/homebrew-core.git 
-  git -C "$(brew --repo homebrew-cask)" remote set-url origin https://mirrors.aliyun.com/homebrew/homebrew-cask.git
+  git -C "$(brew --repo homebrew/core)" remote set-url origin https://mirrors.aliyun.com/homebrew/homebrew-core.git 
+  git -C "$(brew --repo homebrew/cask)" remote set-url origin https://mirrors.aliyun.com/homebrew/homebrew-cask.git
   export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.aliyun.com/homebrew/homebrew-bottles
 else
   exit 0
diff --git a/proxy.sh b/proxy.sh
index 6d236c5..c7e0526 100755
--- a/proxy.sh
+++ b/proxy.sh
@@ -1,9 +1,11 @@
 #!/bin/bash
 
+echo "=== Please run with 'source proxy.sh', otherwise it has no effect on the current shell"
+
 if [ -n "$1" ]; then
     proxySwitch="$1"
 else
-    echo "=== 开启或关闭网络代理？ s or 1 for start, t or 0 for terminate, anything else for no change."
+    echo "=== 开启或关闭网络代理？ [s/1] for start, [t/0] for terminate, [anything else] for no change."
     read -p ">>> " proxySwitch
 fi