diff --git a/README.md b/README.md
index 4b7a662..6498e14 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,14 @@ insmod tcp_const.ko # Require root privilege
 ## Troubleshooting:
 
 If compilation failed and says the function signature does not match, simply delete those two unnamed parameters.
+
+## Next steps:
+
+You can change the size of constant cwnd for even better performance.
+```bash
+echo 2000 >/sys/module/tcp_const/parameters/const_cwnd
+```
+
+## See also:
+
+https://zhuanlan.zhihu.com/p/555328566