Su Bin and Xu Zeming met in their prime, knew each other in their scholarly business, and fell in love when they were young and ignorant. The tension when they met, the sympathy when they got to know each other, and the tenderness when they fell in love, none of this could change the fact that they were road friends. Perhaps Xu Zeming was just a passing friend that Su Bin met at that age. The calmness of falling in love and the relief of separation are enough to show that in this world, no one can live without anyone, and no one must follow someone in this life. Xu Zeming has his own life, and Su Bin naturally has his own little life. There is no difficulty between them when they meet or say goodbye. Even if they haven't seen each other for ten years, when they meet again, they can say without surprise: "Long time no see, friend."