FYI Chongqing is a municpality. It is governed directly by the central govenment and is no longer a part of Sichuan Province.

The orginal poster shouldn't have the same problems here. Meten / Metro also operate in Chengdu. Not a 100% sure, but I think they usually get visas sorted out in CQ.

I am not sure if this is 100% accurate, but a Chinese friend was expaining how the chains operate. Generally only one of the schools is full licensed and registered and can arrange visas. So what goes for Meten is probably the same with NDI and WEB.