Dr. Hans Uwe Dahms, visiting professor of Hong Kong University of Science and Technology,
visited the Sperm Laboratory at Zhejiang University during Dec. 22 to Dec. 25, 2005. Photo taken at
Zi Jin Gang Campus of Zhejiang University with the Yang Group. From left to right: Hongshan Dong,
Hans Uwe Dahms, Xiang Xiao and Wan-Xi Yang.