Check coding
show variables like 'char%';
result
+--------------------------+--------+ | Variable_name | Value | +--------------------------+--------+ | character_set_client | gbk | | character_set_connection | gbk | | character_set_database | utf8 | | character_set_filesystem | binary | | character_set_results | gbk | | character_set_server | utf8 | | character_set_system | utf8 | +--------------------------+--------+
The results can be seen to show character_set_results encoding gbk
To store DB and consistent coding, here changed utf8
set character_set_results=utf8;