That's Blizzard America, of course. If I'm not mistaken, there is technically no Blizzard _inside of_ China. They license their IP, etc..., to a Chinese (CCP approved) company-of-sorts who is then responsible for it's dealings inside China.

But, yes, something fucky is going on with their account management system, which is actively blocking people from disabling their accounts (via blocking account verification attempts, I believe).