Maybe I'm just being overly sensitive because of years of white people making the "all Chinese people look the same" comment to my face, but having lived for decades in three major Chinese cities and travelled to at least a dozen more, I don't see how many of them are "the same" unless you're focusing on the things that would be generally "the same" in every country.
Like yeah, of course public transport is gonna be copy pasted in most places anywhere in the world because there's only so many effective and efficient ways to build a bus stop or train station. But I don't see how you can look at the massive mountains of Chongqing and now they impact urban design and say "this is the same as the relentless flatness of Shanghai". Hell, even though Beijing and Shanghai are both pretty flat, Shanghai's streets are much more curved and flowing because they follow rivers as opposed to the radial geometry of Beijing.
Beijing and Shanghai are pretty unique because of their histories, and Chongqing because of its wacky geography, but when you start hitting the tier-whatever cities they start to lose their variety.
Obviously homogeny between cities isn't unique to China but when they've had so much building and development so recently, it's more blatant, to me at least.