How to upgrade the black diamond when the experience value of Zhixing reaches?

Before upgrading, you need to terminate your previous permissions.

If you have purchased other members before, you need to wait until the expiration to open a new member.

Zhixing app is a professional ticketing platform. Users can self-check ticket information and remaining tickets and book tickets online. It also supports booking special hotels, and the rooms are guaranteed, allowing users to travel intelligently and live intelligently.