1. There aren't many conflicting results if you look carefully for data. This is data for PhD students from Mainland undergoing their PhD in the US, who are being asked for their preference to stay or return after PhD. This is based on preference and not necessarily the reality. Also, this is asking for immediate return, and excludes those who may return subsequently, say after 2-3 years of some research in a commercial lab.
That said, with 82% refusing to return after their PhD is already very dire condition.
2. Pan Jianwei is an exception, for he seems to be very Nationalistic as well. I remember his first words to his supervisor in Europe was, "That he wants to return to China to create a lab like this."
Also, you are wrong. Most of the China's best minds stay in the US. Just have a look at world's best material scientists. The most cited, (I forget the name) is Chinese, yet he is in US.
3. I have created this page, because I am a China tech scene watcher, and as such get regular news regarding China tech space from Google News, and it has become frustrating for me to keep reading articles, which have been picked up because of the mention of the word "China" and "technology," but have nothing to do with China's technology in the sense that it was not created by a Chinese lab, or company, but by a Chinese in US.