Query Run
use zhwiki_p; select * from user where user_name rlike "武漢肺炎"; 3 years ago
use zhwiki_p; select * from user where user_name rlike "武[汉漢]肺炎"; 3 years ago
use zhwiki_p; select * from user where user_name rlike "武([汉漢])?肺(炎)?"; 3 years ago