Edit: If you're interested about Yau, here's a NYT article (http://www.nytimes.com/2006/10/17/science/17yau.html?_r=1)
"But even his admirers say he has a political side. “As Shiing-Shen Chern’s successor as emperor of Chinese mathematics,” Deane Yang, a professor of mathematics at Polytechnic University in Brooklyn and an old family friend, wrote in a letter to The New Yorker, “Yau has an outsized ego and great ambition, and has done things that dismay his peers.” But, Dr. Yang said, Dr. Yau has been a major force for good in mathematics and in China, a prodigious teacher who has trained 39 Ph.D.’s."