China is also, again by far, the largest e-commerce market and the largest mobile payments market on Earth.
I apologize for sounding like an infomercial, but these are basic economic facts that one would expect a reasonably well-read individual to be aware of. I would advise that in future you get better informed before coming here to advertise your ignorance.
I'm not sure how true that is anymore. Companies trying to manufacture elsewhere have to cope with 101 issues that increase costs. Everything from JIT logistics not working to lack or workers to uncooperative governments. China is getting more expensive and some low skill work is going elsewhere. But for most companies, setting up elsewhere means prices much higher than the market will tolerate.