diff --git a/tests/system-test/1-insert/test_stmt_insert_query_ex.py b/tests/system-test/1-insert/test_stmt_insert_query_ex.py
index 1a286ceadca1f0cb519eea43d7388b0990032822..376b60d615941323bedcf40d591817e30c8da05a 100644
--- a/tests/system-test/1-insert/test_stmt_insert_query_ex.py
+++ b/tests/system-test/1-insert/test_stmt_insert_query_ex.py
@@ -213,7 +213,7 @@ class TDTestCase:
             params[11].float([3, None, 1])
             params[12].double([3, None, 1.2])
             params[13].binary(["abc", "dddafadfadfadfadfa", None])
-            params[14].nchar(["涛思数据", None, "a long string with 中文字符"])
+            params[14].nchar(["涛思数据", None, "a? long string with 中文字符"])
             params[15].timestamp([None, None, 1626861392591])
             
             stmt.bind_param_batch(params)
@@ -230,17 +230,28 @@ class TDTestCase:
             querystmt1.execute() 
             result1=querystmt1.use_result()
             rows1=result1.fetch_all()
-            print(rows1)
+            print("1",rows1)
+
             querystmt2=conn.statement("select abs(?) from log where bu < ?")
             queryparam2=new_bind_params(2)
-            print(type(queryparam1))
+            print(type(queryparam2))
             queryparam2[0].int(5)
             queryparam2[1].int(5)
             querystmt2.bind_param(queryparam2)
             querystmt2.execute() 
             result2=querystmt2.use_result()
             rows2=result2.fetch_all()
-            print(rows2)
+            print("2",rows2)
+
+            querystmt3=conn.statement("select abs(?) from log where  nn= 'a? long string with 中文字符' ")
+            queryparam3=new_bind_params(1)
+            print(type(queryparam3))
+            queryparam3[0].int(5)
+            querystmt3.bind_param(queryparam3)
+            querystmt3.execute() 
+            result3=querystmt3.use_result()
+            rows3=result3.fetch_all()
+            print("3",rows3)
             # assert str(rows1[0][0]) == "2021-07-21 17:56:32.589111"
             # assert rows1[0][10] == 3
             # assert rows1[1][10] == 4