1. One is 20 16, because Guo Wentao graduated from Peking University and Pu Yixing graduated from Nantah. When they are in a certain program, they have a strong sense of picture together. Because of high face value and high IQ, many fans named them North and South cp.

2. The other is the North-South cp, which started in the second phase of the first season in Guo Wentao. When they recorded the last stop, because one was the campus grass of Nanjing University and the other was the campus grass of Peking University, they formed the North-South cp.

I hope the above information is helpful to you.