They don't need to do anything militarily. Just keep up with Belt and Road and being a stable trade partner while the US has a trade war with everyone and started an active war with Iran over nothing, and is threatening allies. Fill the vacuum the US left behind and see what happens when the US wants to put sanctions on China in the future.

Exactly, in the fall and aftermath of WWII the USofA Steven Bradbury'd it's way to No. #1 on the global pecking order.

China, now, is ready to do as little as possible and free skate into that position by the same means.

Ya, China will win by default, why do something stupid like Trump would? Make friends with the world, provide working affordable solutions to the high price of oil. Uhm, it’s like Trump is doing everything for China’s benefit.