In Changsha, I met Peng Xiang, who came for vacation from USA(We were in same group when I was in OSC).He will has his oral defence for Ph.D degree.Wish him to success smoothly.

• 此次在长沙，很高兴见到了从美国回国度假的朋友彭翔（我在美国的时候，我们在一个课题组），他将于本月12日进行博士论文答辩，预祝他成功.