diff --git a/README.md b/README.md
index b215000c..d921eb80 100644
--- a/README.md
+++ b/README.md
@@ -154,6 +154,7 @@ Table of Contents
   * [letsencrypt.org](https://letsencrypt.org/) — Free SSL Certificate Authority with certs trusted by all major browsers
   * [globalsign.com](https://www.globalsign.com/en/ssl/ssl-open-source/) — Free SSL certificates for Open Source
   * [startssl.com](https://startssl.com/) — Free SSL certs
+  * [wosign.com](https://buy.wosign.com/free/) — Free SSL certs. Up to 5 domain names for 2 years period. China authority
   * [soclall.com](http://soclall.com/) — Free up to 1,000 users login, post, share through top 20+ social networks
   * [stormpath.com](https://stormpath.com/) — Free user management, authentication, social login, and SSO
   * [auth0.com](https://auth0.com/) — Hosted free for development SSO