diff --git a/tests/examples/c/asyncdemo.c b/tests/examples/c/asyncdemo.c
index 0c98797cb837544ed4ca46201e0696fabbe846ac..1e523bd7fec9ba9fd90d1a71949f40c7be71384d 100644
--- a/tests/examples/c/asyncdemo.c
+++ b/tests/examples/c/asyncdemo.c
@@ -108,11 +108,11 @@ int main(int argc, char *argv[])
 
   printf("start to insert...\n");
   gettimeofday(&systemTime, NULL);
-  //st = systemTime.tv_sec * 1000000 + systemTime.tv_usec;
+  st = systemTime.tv_sec * 1000000 + systemTime.tv_usec;
 
   for (i = 0; i<numOfTables; ++i) {
     // insert records in asynchronous API
-    sprintf(sql, "insert into %s values(now, 0)", tableList[i].name);
+    sprintf(sql, "insert into %s values(%ld, 0)", tableList[i].name, 1546300800000 + i);
     taos_query_a(taos, sql, taos_insert_call_back, (void *)(tableList + i));
   }
 
@@ -174,7 +174,7 @@ void taos_insert_call_back(void *param, TAOS_RES *tres, int code)
 
   if (pTable->rowsTried < points) {
     // for this demo, insert another record
-    sprintf(sql, "insert into %s values(now+%da, %d)", pTable->name, pTable->rowsTried, pTable->rowsTried);
+    sprintf(sql, "insert into %s values(%ld, %d)", pTable->name, 1546300800000+pTable->rowsTried*1000, pTable->rowsTried);
     taos_query_a(pTable->taos, sql, taos_insert_call_back, (void *)pTable);
   }
   else {
diff --git a/tests/examples/c/demo.c b/tests/examples/c/demo.c
index 7f2809c8b16de132948e07f59a98d55882664ee8..a0c4588e6f38a6c6e8f87ec2a984720833f3df3b 100644
--- a/tests/examples/c/demo.c
+++ b/tests/examples/c/demo.c
@@ -68,7 +68,7 @@ int main(int argc, char *argv[]) {
   // insert 10 records
   int i = 0;
   for (i = 0; i < 10; ++i) {
-    sprintf(qstr, "insert into m1 values (now+%ds, %d)", i, i * 10);
+    sprintf(qstr, "insert into m1 values (%ld, %d)", 1546300800000 + i * 1000, i * 10);
     if (taos_query(taos, qstr)) {
       printf("failed to insert row: %i, reason:%s\n", i, taos_errstr(taos));
     }