diff --git a/lang/zh/.gitignore b/lang/zh/.gitignore
index 13141a3..8954c13 100644
--- a/lang/zh/.gitignore
+++ b/lang/zh/.gitignore
@@ -73,3 +73,9 @@ gklearn/kernels/.tags
 
 # docker travis debug.
 ci.sh
+
+# outputs.
+outputs/
+
+# pyCharm.
+.idea/