diff --git a/dns-manual-mode.md b/dns-manual-mode.md
index 9661f77..d3f01fd 100644
--- a/dns-manual-mode.md
+++ b/dns-manual-mode.md
@@ -1,4 +1,9 @@
-TODO:
+Dns manual mode can not renew automatically.  It's just for testing purpose.
+
+please use dns api mode or [dns alias mode](https://github.com/Neilpang/acme.sh/wiki/DNS-alias-mode) instead.
+
+
+
 
 ```sh