This was a remarkably detailed and honestly confusing post from Tencent, until I noticed the Chase logo at the top, and it was not by Tencent. (The WeChat team in Tencent there is very small, close, integrated).

Pretty major name clash here, WeChat pay aka WePay, perhaps WeChat Pay, and well, another WePay.

For those not familiar, WeChat, somewhat a WhatsApp+/Facebood Messenger of China, probably earlier mover however riding from QQ, transact billions of yuan in payments every day and together with AliPay is promoting a cashless society (which I think is wrong, I like cash).