If you start a business in the US and you're only adding China DC's specifically for Chinese customers, I don't see why you'd invest more time and money in connecting the CCP to your US DC's.
It would make more sense that Chinese customers would want to host their data in the US not vice versa, and in that case you would treat them the same as American customers in American data centers with the same security in place.
It's the cheaper solution, caters to all customer needs, and doesn't risk your customers' faith.
I can't think of any reason why they wouldn't separate them.
Do you have some reason to believe they aren't or are you just guessing that they wouldn't take precautions? Because in this case, the precautions are actually the easier topology to build, I think.
It would make more sense that Chinese customers would want to host their data in the US not vice versa, and in that case you would treat them the same as American customers in American data centers with the same security in place.
It's the cheaper solution, caters to all customer needs, and doesn't risk your customers' faith.
I can't think of any reason why they wouldn't separate them.
Do you have some reason to believe they aren't or are you just guessing that they wouldn't take precautions? Because in this case, the precautions are actually the easier topology to build, I think.