An accidental encounter changed Xinyan's life:
Yin Yong, goodbye
Yin Yong, I miss you so much, where are you?
Yin Yong, you can have a good sleep this time.
Yin Yong's departure was a heavy blow to Xinyan, but Xinyan promised him to live a good life: Xinyan, the teacher is gone, I will come back to see you if I can
But what came back in the end was just a letter, a letter left by Yin Yong before his death.
Intention: None