diff --git a/preface.md b/preface.md
index 37b07d4..7ef0c30 100644
--- a/preface.md
+++ b/preface.md
@@ -11,12 +11,12 @@ Go语言圣经 [《The Go Programming Language》](http://gopl.io) 中文版本
 
 在线预览：
 
+- http://gopl-zh.simple-is-best.tk/
 - http://gopl-zh.b0.upaiyun.com/
 - http://docs.ruanjiadeng.com/gopl-zh/
 - http://shifei.me/gopl-zh/
 - http://2goo.info/media/html/gopl-zh-gh-pages/
 - http://docs.plhwin.com/gopl-zh/
-- http://gopl-zh.simple-is-best.tk/
 - https://docs.hacknode.org/gopl-zh/
 
 {% include "./version.md" %}