diff --git a/src/tchMaterial-parser.pyw b/src/tchMaterial-parser.pyw
index a5b3a62..ac2049a 100644
--- a/src/tchMaterial-parser.pyw
+++ b/src/tchMaterial-parser.pyw
@@ -391,7 +391,7 @@ class resource_helper: # 获取网站上资源的数据
                     if not temp_hier["children"]:
                         temp_hier["children"] = {}
 
-                    book["display_name"] = book["title"] if "title" in book else book["name"] if "name" in book else f"(未知电子课本 {book["id"]})"
+                    book["display_name"] = book["title"] if "title" in book else book["name"] if "name" in book else f"(未知电子课本 {book['id']})"
 
                     temp_hier["children"][book["id"]] = book