That's the equivalent of the "Mike Pence can make Donald Trump president" theory. They administer the trademark according to the rules laid out in the WSFS cons

That's the equivalent of the "Mike Pence can make Donald Trump president" theory. They administer the trademark according to the rules laid out in the WSFS constitution; they don't decide who is allowed to use the trademark. The Chengdu bid won the vote legitimately. They would have been massively overstepping their authority to try to prevent it. It's unlikely they could have even won a court case if they tried to prevent it.