To be fair, it is not tough at all for a "high-skilled" foreigner to work at China by getting a Z-visa - I guess most employees at Bay Area fall into this category.
Indeed - they're pretty lax as countries go and there's other ways as well. Only downside is it's virtually impossible for a foreign citizen to get permanent residency for China, so you'll be renewing that visa every two years for the rest of your life.
