diff --git a/.env.example b/.env.example
index 3e4f4e8845a..f92b6bf9cf5 100644
--- a/.env.example
+++ b/.env.example
@@ -350,6 +350,7 @@ ILLEGAL_MODEL_REQ_SCORE=5
 #========================#
 
 CHECK_BALANCE=false
+# START_BALANCE=20000 # note: the number of tokens that will be credited after registration.
 
 #========================#
 # Registration and Login #