@AbRaj, if UNSC brings a resolution with majority against another member, that member can't use its veto. So if four UNSC members vote to throw china out of UNSC, China's veto will have no effect and it will be fait accompli. UNGC after that will be just a passover.
I think you are wrong on this.

United Nations: What are the procedures of canceling permanent membership of the UN security council?
Mark Binfield's answer: The permanent members of the UN Security Council are listed by name in Chapter 5 of the UN Charter: Charter of the United Nations. That chapter includes procedures for selecting the non-permanent members, but no procedures for changing the list of permanent members. Thus,...