I believe that's super easy to answer: VC money. Salaries in the US are a multiple of what they are inside China. And for the top 0.1% on the skill scale, the

I believe that's super easy to answer: VC money. Salaries in the US are a multiple of what they are inside China. And for the top 0.1% on the skill scale, the factor is probably 10x to 100x. Now not everyone reaches that level and many fail and burn (or suffer through un-payable student loans for many years), but still the few people that make it into OpenAI are probably paid 100x of what they could earn in their hometown in Asia.