Tan Rou and Zhuang Liu sat in the last row, enjoying the show, believing that the teacher wouldn't pick them since they had already said they weren't students, just there to film.
However, this teacher's thought process was clearly not normal; she instantly chose Tan Rou and Zhuang Liu, though she did not know their names, but that did not stop her from calling them up, "Those two students in the last row, a man and a woman, please come to the podium. We are going to draw lots for teams shortly."
Tan Rou and Zhuang Liu exchanged glances, puzzled as to why the teacher had picked them, but with filming going on behind them, they couldn't call a halt and just had to go along with the teacher's request.
It was quite amusing actually, the topic was "Should students date in college?" and it was obvious to anyone that they were a couple. The teacher had picked them on purpose. Surely she wasn't planning to split them into opposite teams? That would be really mean-spirited.