Cheng E(1964-), graduated from the Department of Physics of Peking University in 1984, went to the United States to study in 1986, received his Ph.D. degree from the Department of Physics of Pennsylvania State University in 1990, and then did post-doctoral research at Ohio State University, the University of Paris, and the University of California (Berkeley). He has worked as a computer software engineer since 1996. In his spare time, he occasionally writes about popular science and history. In the early 1980s, Cheng experienced and participated in the pro-democracy movement in the Peking University campus. Since 1999, he has used his spare time to collect and organize historical materials about the 1989 democracy movement, and wrote and published *Standoff at Tiananmen*, a narrative history-style book detailing the movement. The book was originally written in English and published in 2009, and was later translated into Chinese by Cheng. The English version can be purchased [here](https://www.barnesandnoble.com/w/standoff-at-tiananmen-eddie-cheng/1017856719).
