If China walks away from US economy, it will be a disaster

And they truly can, now. They have the largest ongoing infrastructure market. It will take all kinds of investments from the world by just a piece of paper called "government gurrantee" - the best no-cost future return promises to the investors. And it worked productively in Deng's time. Look at Beijing's new airport - Can US or Japan or UK builds one in 10 years? What would happen over there in 10 years from now? There are only three options to this aggressive competitor and co-operator:

(1) Close eyes and let it be. US has lost 2 decades by doing that. 

(2) Try to stop or destroy it as Trump's administration dreamed. How? What the cost of Afganistan war so far? 

(3) Get into it and be part of it. A pan Sino-US joint economy and infrastructure market? May be pan Indi-Sino-US economy? 

I see No.3 is the end game, but No. 2 is now the dominated approach in DC. That's very dangerous to the rest of the world.