First, log in to http://school.qq.com Use your own QQ number to log in to the left alumni. After logging in, click "Personal Business Card" to register, you can fill in the registration information. After the success of the registration, you can search for any school (for example, Tsinghua University) in the place of "Search School". Then you will see the list of schools, just enter a school, then find the "Create Class" place in the top of the page, this class name is the name of the QQ group, just select the year, click registration Yes. You will get a prompt to register successfully, see if you have this group in your QQ, you can manage QQ group there.
