I think it's simpler to just appeal to every entrepreneur's spider sense - go where the great people are. It really does feel a bit like how Silicon Valley and San Francisco felt in 2000s-2010s. Caveat of course, which is even before 2008, aware insiders of SV were trying to warn that the Goodness of the internet was being squeezed too hard, that VC was turning to rent seeking too soon, the cart is way too far ahead of the basic research pipeline, etc. And of course, there's corruptible people, terrible overwork, insane competition, bad stuff etc in China too.

But there's a determined, undeniable sense of "we're going to make the world a better place", and you can physically see and touch it in China. Once you take a big inhale of that air, you realize just how much you missed it and needed it.