diff --git a/source/util/src/tcompare.c b/source/util/src/tcompare.c
index 381ef11804..7a52991e81 100644
--- a/source/util/src/tcompare.c
+++ b/source/util/src/tcompare.c
@@ -23,6 +23,7 @@
 #include "thash.h"
 #include "tlog.h"
 #include "types.h"
+#include "osString.h"
 
 int32_t setChkInBytes1(const void *pLeft, const void *pRight) {
   return NULL != taosHashGet((SHashObj *)pRight, pLeft, 1) ? 1 : 0;
@@ -208,16 +209,16 @@ int32_t compareLenPrefixedWStr(const void *pLeft, const void *pRight) {
   int32_t len1 = varDataLen(pLeft);
   int32_t len2 = varDataLen(pRight);
 
-  if (len1 != len2) {
-    return len1 > len2 ? 1 : -1;
-  } else {
-    int32_t ret = memcmp((TdUcs4 *)pLeft, (TdUcs4 *)pRight, len1);
-    if (ret == 0) {
+  int32_t ret = tasoUcs4Compare((TdUcs4 *)varDataVal(pLeft), (TdUcs4 *)varDataVal(pRight), len1>len2 ? len2:len1);
+  if (ret == 0) {
+    if (len1 > len2)
+      return 1;
+    else if(len1 < len2)
+      return -1;
+    else
       return 0;
-    } else {
-      return ret > 0 ? 1 : -1;
-    }
   }
+  return (ret < 0) ? -1 : 1;
 }
 
 int32_t compareLenPrefixedWStrDesc(const void *pLeft, const void *pRight) {
diff --git a/tests/system-test/2-query/json_tag.py b/tests/system-test/2-query/json_tag.py
index 1c2a6055bc..df460df5c3 100644
--- a/tests/system-test/2-query/json_tag.py
+++ b/tests/system-test/2-query/json_tag.py
@@ -408,8 +408,8 @@ class TDTestCase:
         # test group by & order by  json tag
         tdSql.query(f"select ts,jtag->'tag1' from {dbname}.jsons1 partition by jtag->'tag1' order by jtag->'tag1' desc")
         tdSql.checkRows(11)
-        tdSql.checkData(0, 1, '"femail"')
-        tdSql.checkData(2, 1, '"收到货"')
+        tdSql.checkData(0, 1, '"收到货"')
+        tdSql.checkData(2, 1, '"femail"')
         tdSql.checkData(7, 1, "false")
 
 
@@ -421,9 +421,10 @@ class TDTestCase:
         tdSql.query(f"select count(*),jtag->'tag1' from {dbname}.jsons1 group by jtag->'tag1' order by jtag->'tag1' desc")
         tdSql.checkRows(8)
         tdSql.checkData(0, 0, 2)
-        tdSql.checkData(0, 1, '"femail"')
+        tdSql.checkData(0, 1, '"收到货"')
+        tdSql.checkData(1, 1, '"femail"')
         tdSql.checkData(1, 0, 2)
-        tdSql.checkData(1, 1, '"收到货"')
+        
         tdSql.checkData(2, 0, 1)
         tdSql.checkData(2, 1, "11.000000000")
         tdSql.checkData(5, 0, 1)
@@ -437,7 +438,7 @@ class TDTestCase:
         tdSql.checkData(5, 0, 1)
         tdSql.checkData(5, 1, "11.000000000")
         tdSql.checkData(7, 0, 2)
-        tdSql.checkData(7, 1, '"femail"')
+        tdSql.checkData(7, 1, '"收到货"')
 
         # test stddev with group by json tag
         tdSql.query(f"select stddev(dataint),jtag->'tag1' from {dbname}.jsons1 group by jtag->'tag1' order by jtag->'tag1'")
@@ -445,8 +446,8 @@ class TDTestCase:
         tdSql.checkData(0, 1, None)
         tdSql.checkData(4, 0, 0)
         tdSql.checkData(4, 1, "5.000000000")
-        tdSql.checkData(7, 0, 11)
-        tdSql.checkData(7, 1, '"femail"')
+        tdSql.checkData(6, 0, 11)
+        tdSql.checkData(7, 1, '"收到货"')
 
         res = tdSql.getColNameList(f"select stddev(dataint),jsons1.jtag->'tag1' from {dbname}.jsons1 group by jsons1.jtag->'tag1' order by jtag->'tag1'")
         cname_list = []