When they met, he filled his life and memory with his own shadow, and tied a bell in his heart that only he could untie; when they fell in love, the silk thread pulling the bell entangled the two together; when they broke up, he left dejectedly, but that thread and that bell were tightly entangled in his mind. Therefore, they are destined to be each other's salvation, and they are also destined to be entangled in this life.