diff --git a/handler/ad.py b/handler/ad.py
index a41b368..8406364 100644
--- a/handler/ad.py
+++ b/handler/ad.py
@@ -155,7 +155,7 @@ class Ad(Resource):
 		# 检查该广告是否已存在
 		try:
 			check_sql = f"select id from ad where name='{ad['name']}' and gameid={ad['gameid']} and \
-			locationid={ad['locationid']} and companyid=ad['companyid']"
+			locationid=‘{ad['locationid']}’ and companyid={ad['companyid']}"
 			data = self.mydb.query(check_sql)
 			if data:
 				return jsonify({'code': 500, 'message': f"name={ad['name']} gameid={ad['gameid']} was in db!"})