you do realize china is like the largest trade partners of many many countries around the world? and the world largest manufacturer? practically everything you have in your modern life has some part from or is assembled in china.
and with 3.3 trillion in exports and 2.7 trillion in imports.
Thats trillions of trade gone if china stops trading and not even counting the knock on effects. this would be a world market meltdown situation. with so many goods made in china, you cannot replace them quickly or easily or cheaply, this is what will cause hyperinflation, those 300$ TVs will be 1500$, that 20,000$ car will be 50,000$ overnight and its get worse from there as the average folks purchasing power crashes, many goods will simply not be available.
even in those places where china isn't the #1 trade partner, it is #2, like the EU.