diff --git a/scripts/encrypt_string.py b/scripts/encrypt_string.py
index eb6e366..a822a1f 100644
--- a/scripts/encrypt_string.py
+++ b/scripts/encrypt_string.py
@@ -17,6 +17,7 @@ def main() -> int:
         plaintext = sys.argv[1]
     if plaintext is None:
         try:
+            # 示例 postgresql://user:password@host:port/dbname
             plaintext = input("请输入要加密的文本: ")
         except EOFError:
             plaintext = ""