diff --git a/modules/base.nix b/modules/base.nix
index f155fa8b..eb63882a 100644
--- a/modules/base.nix
+++ b/modules/base.nix
@@ -88,10 +88,12 @@
     substituters = [
       # cache mirror located in China
       # status: https://mirrors.ustc.edu.cn/status/
-      "https://mirrors.ustc.edu.cn/nix-channels/store"
-      "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store"
+      # "https://mirrors.ustc.edu.cn/nix-channels/store"
       # status: https://mirror.sjtu.edu.cn/
-      "https://mirror.sjtu.edu.cn/nix-channels/store"
+      # "https://mirror.sjtu.edu.cn/nix-channels/store"
+      # others
+      "https://mirrors.sustech.edu.cn/nix-channels/store"
+      "https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store"
 
       "https://nix-community.cachix.org"
       # my own cache server, currently not used.
diff --git a/modules/darwin/apps.nix b/modules/darwin/apps.nix
index 7dabc0ac..c0cdc0e6 100644
--- a/modules/darwin/apps.nix
+++ b/modules/darwin/apps.nix
@@ -26,10 +26,18 @@ let
   # Homebrew Mirror
   # NOTE: is only useful when you run `brew install` manually! (not via nix-darwin)
   homebrew_mirror_env = {
-    HOMEBREW_API_DOMAIN = "https://mirrors.tuna.tsinghua.edu.cn/homebrew-bottles/api";
-    HOMEBREW_BOTTLE_DOMAIN = "https://mirrors.tuna.tsinghua.edu.cn/homebrew-bottles";
-    HOMEBREW_BREW_GIT_REMOTE = "https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git";
-    HOMEBREW_CORE_GIT_REMOTE = "https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git";
+    # tuna mirror
+    # HOMEBREW_API_DOMAIN = "https://mirrors.tuna.tsinghua.edu.cn/homebrew-bottles/api";
+    # HOMEBREW_BOTTLE_DOMAIN = "https://mirrors.tuna.tsinghua.edu.cn/homebrew-bottles";
+    # HOMEBREW_BREW_GIT_REMOTE = "https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git";
+    # HOMEBREW_CORE_GIT_REMOTE = "https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git";
+    # HOMEBREW_PIP_INDEX_URL = "https://pypi.tuna.tsinghua.edu.cn/simple";
+
+    # nju mirror
+    HOMEBREW_API_DOMAIN = "https://mirror.nju.edu.cn/homebrew-bottles/api";
+    HOMEBREW_BOTTLE_DOMAIN = "https://mirror.nju.edu.cn/homebrew-bottles";
+    HOMEBREW_BREW_GIT_REMOTE = "https://mirror.nju.edu.cn/git/homebrew/brew.git";
+    HOMEBREW_CORE_GIT_REMOTE = "https://mirror.nju.edu.cn/git/homebrew/homebrew-core.git";
     HOMEBREW_PIP_INDEX_URL = "https://pypi.tuna.tsinghua.edu.cn/simple";
   };