pear wang
@superpear
China, Nanjing
Joined Jan 2011
World Rank: #23802 (1.2 points)
Institution: Hanzhong Railway school
Activity over the last year
Effectiveness
- Problems solved
- 29
- Solutions submitted
- 200
China, Nanjing
Joined Jan 2011
World Rank: #23802 (1.2 points)
Institution: Hanzhong Railway school