Update 03-opentsdb-telnet.mdx

docs/en/07-develop/03-insert-data/03-opentsdb-telnet.mdx

@@ -32,7 +32,7 @@ For example:
 meters.current 1648432611250 11.3 location=California.LosAngeles groupid=3
 ```
 
-- The defult child table name is generated by rules.You can configure smlChildTableName in taos.cfg to specify child table names, for example, `smlChildTableName=tname`. You can insert `meters.current 1648432611250 11.3 tname=cpu1 location=California.LosAngeles groupid=3` and the cpu1 table will be automatically created. Note that if multiple rows have the same tname but different tag_set values, the tag_set of the first row is used to create the table and the others are ignored.
+- The child table name is created automatically in a rule to guarantee its uniqueness. But you can configure smlChildTableName in taos.cfg to specify a tag value as the table names if the tag value is unique globally. For example, if a tag is called 'tname' and you set `smlChildTableName=tname` in taos.cfg, when you insert `st,tname=cpul,t1=4 c1=3 1626006833639000000`, the table 'cpus1' will be automatically created. Note that if multiple rows have the same tname but different tag_set values, the tag_set of the first row is used to create the table and the others are ignored.
   Please refer to [OpenTSDB Telnet API](http://opentsdb.net/docs/build/html/api_telnet/put.html) for more details.
 
 ## Examples