there are ongoing tough competitions between China and America, that is for sure. however, a bold however, it is not in China's interest to see a crashed America. as an export oriented economy, China needs a stable and functioning America to maintain global order, that is how China got free lunch for the last 3 decades.

just imagine a world without the US acting as the world police, you'd be seeing armed conflicts in middle east, Africa, South East Asia, even in Europe and North East Asia. that would make China extremely hard to extract 1 trillion USD trade surplus a year, which is now required for China to maintain employment back at home.

without the US, even for a relatively stable global environment, trade won't be possible as most countries are not capable of providing goods and services wanted by China. Their currencies are literally junk (including Japanese Yen and Euro), Chinese are not going to take those junk in exchange for real goods. Trade is now possible because, by one way or another, those countries have USD to pay. those USD are backed by 300+ million highly productive Americans who repeatedly proved that they can create values in the scale of dozens of trillions a year.

the best part of this whole thing - America is singlehandedly footing the whole bill to provide such trade friendly environment for China for FREE. this is not cold war v2, back in the days of cold war, the US didn't help USSR to such extreme extent.