Causes of Return for High Skilled Chinese Migrants in the US

FP article today mentioned that: 

China is getting a major boost from the return home of Western-educated, skilled workers. They are returning because of frustrations with U.S. visa policies that make it extremely difficult for skilled workers from high-population countries to obtain permanent-resident visas; because of opportunities back home; and because the Chinese government is offering huge incentives to engineers and scientists. These returnees are teaching locals how to build world-class companies and how to innovate. In almost every high-growth tech company in China, you find returnees in senior management positions. In scientific research, top research labs have returnees in lead positions. And these scientists are beginning to make breakthroughs.

In short, the article suggests that these migrants return because of (frustrating) US naturalization policies, job market incentives back home, and active government recruiting policies.