I'm not saying "therefore they must be the maximum amount of violent at all opportunities". Can you point to any period in history in which empires were just chill and sung kumbaya all day long, though?

We have substantial real world evidence that China does not prefer to take that approach.

We have zero evidence that China would not take that approach in a world without Pax Americana (as much as I think the term is silly, it's a convenient shorthand). We do have a lot of evidence that China is a normal country like everywhere else and pushes their interests where possible:

https://en.wikipedia.org/wiki/Chinese_salami_slicing_strategy