1, install mysql assembly, add the following assemblies in the project XXX.EntityFrameworkCore
pomelo.entityframeworkcore.mysql
pomelo.entityframeworkcore.mysql.design
2, modify XXX.EntityFrameworkCore directory configuration files, modify file DBContextConfiguer
3, modify the connection string to find the file in the Web.Host appsetting.json or Web.MVC and modify the connection string.
"Default": "Server=xxx.xxx.xxx.xxx; Database=surrounddb;charset=utf8;uid=root;pwd=123456;"