What is the role of Wu Sang in If You Are the One? What's the relationship with Qin Fen? Thank you, God, please help me.

Well, what the previous person said is only the second person is right. If you watch the movie, you shouldn’t give such an answer. Wu Sang is one of Qin Fen’s few close friends and he married a wife in Japan. Qin Fen stayed in Japan and accompanied Liang Xiaoxiao to Hokkaido (xiaoxiao was to completely forget her relationship with the married man). Wu Sang, as their tour guide, was finally at the hospital entrance and Wu Sang wanted to leave Hokkaido quickly (he said at the time: If you don’t leave your job, you will lose it.) Qin Fen gave Wu Sang some money, saying it was for his wife and children. I think it was a sign of gratitude and cherishment to Wu Sang. In the end, Wu Sang was driving on the beautiful road alone, singing. I got choked up while singing and I even cried when I saw him. He was also reluctant to let go. His reluctance towards Qin Fen may also be mixed with a little sadness that he was alone in a foreign country and his best friend was about to leave.