diff --git a/Blogs-and-tutorials.md b/Blogs-and-tutorials.md
index e19dc6a5..35c148be 100644
--- a/Blogs-and-tutorials.md
+++ b/Blogs-and-tutorials.md
@@ -11,6 +11,7 @@ Here are some blogs that may help you:
 1. https://lazydog.me/post/create-a-blog-step-by-step.html#toc-705
 1. https://www.chdon.com/463.html
 1. https://xlange.com/post/getting-started-letsencrypt.html
+1. [使用acme签发&续期 Let's Encrypt 证书](https://painso.com/2017/02/28/acme-lets-encrypt-issue/)
 1. https://www.zhuyurun.cn/2017/02/19/ru-he-gei-wang-zhan-shang-https/
 1. http://www.qingpingshan.com/m/view.php?aid=183153
 1. https://github.com/Neilpang/acme.sh/wiki/%E8%AF%B4%E6%98%8E