Zhang Guohan, Tian Tian Chess APP Amateur 9- 1, is currently a lecturer in the Department of Mathematics, School of Science, Beijing University of Posts and Telecommunications. 20 14 runner-up in Manchester European championship, 20 17 world chess championship 14. On 20 18, he won the eighth place in Tianjin TV Chess Quick Competition. Zhang Guohan, a master of learning, graduated from Nankai University on 201/kloc-0, graduated from Birmingham University on 20 17, and left the station as a postdoctoral fellow at the Institute of Mathematics and System Science of China Academy of Sciences on 20 19.