diff --git a/src/client/src/tscParseOpenTSDB.c b/src/client/src/tscParseOpenTSDB.c
index 12f8ec84fd301d2d8851e92826cfcb3d860c1ceb..8e0322cab07ba462b7320cef02011b27b18785d5 100644
--- a/src/client/src/tscParseOpenTSDB.c
+++ b/src/client/src/tscParseOpenTSDB.c
@@ -178,6 +178,9 @@ static int32_t parseTelnetTagKey(TAOS_SML_KV *pKV, const char **index, SHashObj
       tscError("OTD:0x%"PRIx64" Tag key cannot exceeds 65 characters", info->id);
       return TSDB_CODE_TSC_INVALID_COLUMN_LENGTH;
     }
+    if (*cur == ' ') {
+      return TSDB_CODE_TSC_LINE_SYNTAX_ERROR;
+    }
     if (*cur == '=') {
       break;
     }
@@ -211,8 +214,8 @@ static int32_t parseTelnetTagValue(TAOS_SML_KV *pKV, const char **index,
   start = cur = *index;
 
   while (1) {
-    // ',' or '\0' identifies a value
-    if (*cur == ',' || *cur == '\0') {
+    // whitespace or '\0' identifies a value
+    if (*cur == ' ' || *cur == '\0') {
       // '\0' indicates end of value
       *is_last_kv = (*cur == '\0') ? true : false;
       break;
diff --git a/tests/examples/c/apitest.c b/tests/examples/c/apitest.c
index 28e8d3f012dd4d6b4b12f2a01132b00a2ae7225c..03123afb3584ea94417c88e55edd9f8e232b0fe9 100644
--- a/tests/examples/c/apitest.c
+++ b/tests/examples/c/apitest.c
@@ -1033,9 +1033,9 @@ void verify_telnet_insert(TAOS* taos) {
 
   /* metric */
   char* lines0[] = {
-      "stb0_0 1626006833639000000ns 4i8 host=\"host0\",interface=\"eth0\"",
-      "stb0_1 1626006833639000000ns 4i8 host=\"host0\",interface=\"eth0\"",
-      "stb0_2 1626006833639000000ns 4i8 host=\"host0\",interface=\"eth0\"",
+      "stb0_0 1626006833639000000ns 4i8 host=\"host0\" interface=\"eth0\"",
+      "stb0_1 1626006833639000000ns 4i8 host=\"host0\" interface=\"eth0\"",
+      "stb0_2 1626006833639000000ns 4i8 host=\"host0\" interface=\"eth0\"",
   };
   code = taos_insert_telnet_lines(taos, lines0, 3);
   if (code) {
@@ -1057,7 +1057,7 @@ void verify_telnet_insert(TAOS* taos) {
   }
 
   /* metric value */
-  //tinyin
+  //tinyint
   char* lines2_0[] = {
       "stb2_0 1626006833651ms -127i8 host=\"host0\"",
       "stb2_0 1626006833652ms 127i8 host=\"host0\""
@@ -1176,8 +1176,8 @@ void verify_telnet_insert(TAOS* taos) {
   /* tags */
   //tag value types
   char* lines3_0[] = {
-      "stb3_0 1626006833610ms 1 t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=3.4E38f32,t6=1.7E308f64,t7=true,t8=\"binary_val_1\",t9=L\"标签值1\"",
-      "stb3_0 1626006833610ms 2 t1=-127i8,t2=-32767i16,t3=-2147483647i32,t4=-9223372036854775807i64,t5=-3.4E38f32,t6=-1.7E308f64,t7=false,t8=\"binary_val_2\",t9=L\"标签值2\""
+      "stb3_0 1626006833610ms 1 t1=127i8 t2=32767i16 t3=2147483647i32 t4=9223372036854775807i64 t5=3.4E38f32 t6=1.7E308f64 t7=true t8=\"binary_val_1\" t9=L\"标签值1\"",
+      "stb3_0 1626006833610ms 2 t1=-127i8 t2=-32767i16 t3=-2147483647i32 t4=-9223372036854775807i64 t5=-3.4E38f32 t6=-1.7E308f64 t7=false t8=\"binary_val_2\" t9=L\"标签值2\""
   };
   code = taos_insert_telnet_lines(taos, lines3_0, 2);
   if (code) {
@@ -1186,9 +1186,9 @@ void verify_telnet_insert(TAOS* taos) {
 
   //tag ID as child table name
   char* lines3_1[] = {
-      "stb3_1 1626006833610ms 1 id=\"child_table1\",host=\"host1\"",
-      "stb3_1 1626006833610ms 2 host=\"host2\",iD=\"child_table2\"",
-      "stb3_1 1626006833610ms 3 ID=\"child_table3\",host=\"host3\""
+      "stb3_1 1626006833610ms 1 id=\"child_table1\" host=\"host1\"",
+      "stb3_1 1626006833610ms 2 host=\"host2\" iD=\"child_table2\"",
+      "stb3_1 1626006833610ms 3 ID=\"child_table3\" host=\"host3\""
   };
   code = taos_insert_telnet_lines(taos, lines3_1, 3);
   if (code) {
diff --git a/tests/pytest/insert/insertTelnetLines.py b/tests/pytest/insert/insertTelnetLines.py
index 8ebb6bd3df4bcd4abfbb8c42cf5024fe066fcce3..4041b309a1007c1177f26d28b022f4e314dcf9ba 100644
--- a/tests/pytest/insert/insertTelnetLines.py
+++ b/tests/pytest/insert/insertTelnetLines.py
@@ -33,9 +33,9 @@ class TDTestCase:
         ### metric ###
         print("============= step1 : test metric  ================")
         lines0 = [
-                        "stb0_0 1626006833639000000ns 4i8 host=\"host0\",interface=\"eth0\"",
-                        "stb0_1 1626006833639000000ns 4i8 host=\"host0\",interface=\"eth0\"",
-                        "stb0_2 1626006833639000000ns 4i8 host=\"host0\",interface=\"eth0\"",
+                        "stb0_0 1626006833639000000ns 4i8 host=\"host0\" interface=\"eth0\"",
+                        "stb0_1 1626006833639000000ns 4i8 host=\"host0\" interface=\"eth0\"",
+                        "stb0_2 1626006833639000000ns 4i8 host=\"host0\" interface=\"eth0\"",
                    ]
 
         code = self._conn.insert_telnet_lines(lines0)
@@ -245,8 +245,8 @@ class TDTestCase:
         print("============= step3 : test tags  ================")
         #tag value types
         lines3_0 = [
-                        "stb3_0 1626006833610ms 1 t1=127i8,t2=32767i16,t3=2147483647i32,t4=9223372036854775807i64,t5=3.4E38f32,t6=1.7E308f64,t7=true,t8=\"binary_val_1\",t9=L\"标签值1\"",
-                        "stb3_0 1626006833610ms 2 t1=-127i8,t2=-32767i16,t3=-2147483647i32,t4=-9223372036854775807i64,t5=-3.4E38f32,t6=-1.7E308f64,t7=false,t8=\"binary_val_2\",t9=L\"标签值2\""
+                        "stb3_0 1626006833610ms 1 t1=127i8 t2=32767i16 t3=2147483647i32 t4=9223372036854775807i64 t5=3.4E38f32 t6=1.7E308f64 t7=true t8=\"binary_val_1\" t9=L\"标签值1\"",
+                        "stb3_0 1626006833610ms 2 t1=-127i8 t2=-32767i16 t3=-2147483647i32 t4=-9223372036854775807i64 t5=-3.4E38f32 t6=-1.7E308f64 t7=false t8=\"binary_val_2\" t9=L\"标签值2\""
                      ]
 
         code = self._conn.insert_telnet_lines(lines3_0)
@@ -288,9 +288,9 @@ class TDTestCase:
 
         #tag ID as child table name
         lines3_1 = [
-                        "stb3_1 1626006833610ms 1 id=\"child_table1\",host=\"host1\"",
-                        "stb3_1 1626006833610ms 2 host=\"host2\",iD=\"child_table2\"",
-                        "stb3_1 1626006833610ms 3 ID=\"child_table3\",host=\"host3\""
+                        "stb3_1 1626006833610ms 1 id=\"child_table1\" host=\"host1\"",
+                        "stb3_1 1626006833610ms 2 host=\"host2\" iD=\"child_table2\"",
+                        "stb3_1 1626006833610ms 3 ID=\"child_table3\" host=\"host3\""
                      ]
 
         code = self._conn.insert_telnet_lines(lines3_1)