diff --git a/install_service.sh b/install_service.sh
index a5910e9..fce5ec1 100755
--- a/install_service.sh
+++ b/install_service.sh
@@ -82,9 +82,9 @@ INSTALLED_SERVICES=()
 usage() {
   cat <<'EOF'
 Usage:
-  curl -fsSL https://punchsky.com/install | bash
+  curl -fsSL https://punchsky.cn/install | bash
 
-  curl -fsSL https://punchsky.com/install | bash -s -- \
+  curl -fsSL https://punchsky.cn/install | bash -s -- \
     -w <work_dir>
 
 Config:
@@ -120,7 +120,7 @@ Placeholders:
   {service_name} will be replaced with the service name.
 
 Example:
-  curl -fsSL https://punchsky.com/install | bash
+  curl -fsSL https://punchsky.cn/install | bash
 EOF
 }