I did some consulting work a few years ago, and back then, the Chinese were barely hanging on and able to keep up with world demand for the capabilities that they offer, supposedly. 3 years ago, i put in a professional paper that China was going to have to do something radical to keep up with the world given their own internal infrastructure issues (transportation, commo/tech, power transmission and distribution (T&D)).
Their infrastructure is ancient and falling apart. It would cost China 3/4 of their transportation infrastructure budget to just bring 10 projects spread out over 8 provinces to the point where they are serviceable enough to operate. That does not include the sheer cost of communist bureaucracy, and the corruption at local levels. That does not even begin to cover and consider the costs for their tech/commo, and T&D infrastructures which are also absolutely failing.
Enter global economic uptick, especially in the States. China, in order to keep money flowing and able to manage their lending and debt service, now faces business demand that it cannot even come close to servicing. Then the US hit them with a sanctions hammer. As counterintuitive as it seems to China, it needs the world to slow down, and run at their level to actually keep revenues flowing.
The actual cost of this act will likely be incalculable. Literally.