diff --git a/mapping/map.go b/mapping/map.go
index 6ae9f4e..9d1ed7d 100644
--- a/mapping/map.go
+++ b/mapping/map.go
@@ -1,6 +1,7 @@
 package mapping
 
 import (
+	"flag"
 	"git.eve.moe/jackyyf/navigator/ipgeo"
 )
 
@@ -17,6 +18,10 @@ const (
 	default_suffix        = GLOBAL_SUFFIX
 )
 
+var (
+	enableCNDomain = flag.Bool("enable-cn-domain", false, "Enable china mainland specific domain")
+)
+
 // Get returns the edge node that should be used for client.
 func Get(ip string) string {
 	db := ipgeo.Get()
@@ -24,7 +29,7 @@ func Get(ip string) string {
 	if err != nil {
 		return default_server + default_suffix
 	}
-	if info_en.CountryCode == "CN" {
+	if *enableCNDomain && info_en.CountryCode == "CN" {
 		return default_server + CHINA_MAINLAND_SUFFIX
 	}
 	return default_server + GLOBAL_SUFFIX