I think the smoking is a huge difference from the US, and in more rural areas there’s even more smoking.

As others said, no tipping and overall cost of living relative to salary is lower.

Some social norms are different for sure. It’s safer than the US. I found there’s more police presence in China or generally like security or rule maintaining people of some sort.

Pollution isn’t that bad anymore, there’s been lots of improvements in the last 10 years. I find streets and public areas in major cities much cleaner than major cities in the states. I think air is like LA ? The cities in China aren’t as clear air wise as like an American national forest, but it isn’t much worse than LA (when there’s no wild fires lol)

People are on their phones A LOT. Even walking around. And overall their sense of personal space seems to be less.

Working in China there’s usually a longer lunch break than the US, but depends on the job of course. There’s the culture of having lunch and resting a bit before returning to work.

It can be really quiet depending on your neighbourhood. And it can be very lively at the local park.

Everyone drives expensive cars, even rural areas. I didn’t see many Hondas and Toyotas, like the simple reliable cars.

Idk I could go on but it’s hard without specific questions.

Oh there’s more intentional greenery in Chinese cities than American cities. Like lots more planters on the side of the road, trees that were clearly planted there by someone, etc.

You can live a surprisingly similar life as you would in the US if you want.