Ma Yijun
@mayijun
China, Yichang
Joined Jan 2016
World Rank: #7721 (4.6 points)
Institution: YLZX
Activity over the last year
Effectiveness
- Problems solved
- 27
- Solutions submitted
- 196
China, Yichang
Joined Jan 2016
World Rank: #7721 (4.6 points)
Institution: YLZX