vi /etc/mysql/mysql.conf.d/mysqld.cnf 

[client]
default-character-set=utf8

[mysql]
default-character-set=utf8

[mysqld]
init_connect=‘SET collation_connection = utf8_unicode_ci‘
init_connect=‘SET NAMES utf8‘
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake