The code can be found here
We were composed by two groups, one lead by Leiyu Zhao and another lead by me. The system aimed at the New Year Show of Tsinghua University. All students would be invited to join and stay together in the night before New Year.
The system built on Wechat, which is Social Software popular in China. We implemented a server in Nodejs which cocurrent quantity if over 1000(verified by JMeter) and a excellent UI design for front-end.
Here are some screenshot of the system: