diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -158,6 +158,7 @@ protocol, based on Twisted.
 - [软件定义网络:SDN与OpenFlow解析](http://www.sdnlab.com/book/9473.html)
 - [Network Algorithmics：An Interdisciplinary Approach to Designing Fast Networked Devices](https://doc.lagout.org/network/Network%20Algorithmics%20An%20Interdisciplinary%20Approach%20to%20Designing%20Fast%20Networked%20Devices.pdf)
 - [Network Programmability and Automation Skills for the Next-Generation Network Engineer](http://shop.oreilly.com/product/0636920042082.do)
+- [SDN网络指南](https://feisky.gitbooks.io/sdn/)(OpenSource Book in Chinese by Pengfei Ni)
 
 ## Paper
 - [SDN A Comprehensive Survey](https://pdfs.semanticscholar.org/d8bd/4c1e92420200bd29cb1a233bd81eb3c28bba.pdf)