diff --git a/zh-cn.py b/zh-cn.py
index 214c651..9317639 100644
--- a/zh-cn.py
+++ b/zh-cn.py
@@ -21,7 +21,7 @@ def get_image(isbn, image_filename):
     :type en_isbn: str
     :rtype: str
     """
-    print("get_image(" + isbn + "," + isbn + ")")
+    print("get_image(" + isbn + "," + image_filename + ")")
     response = urlopen(book_url)
     html = response.read()
     re_image_url = r"https://img\d\.doubanio\.com/lpic/s\d*\.jpg"