Hey im looking to apply for an official invite to M-team but they mention a "secondary verification" the original Chinese is this: 注册后，必须立即打开二级验证。（管理员随时检查，未开即ban）. I dont know what it is and i dont understand chinese to understand it, id hate to join and then get banned.

Can someone enlighten me as to what it is exactly?

I think that is some kind of two-factor login that you need to enable after you register. Like they said, that is required after the registration.