This article is a fanfic of the TV series "Nirvana in Fire", a fantasy story with original characters. The idea for this article comes from my selfish wish that Master Quan Lin would take Mei Changsu and Fei Liu to travel around the mountains and rivers, enjoy the scenery of the four seasons, taste delicious food, not be disturbed by worldly things, and chat and laugh happily between heaven and earth. This article mainly focuses on the perspective of the original character, trying to explain clearly the cause and effect of Mei Changsu's life extension. The original character was designed to change Mei Changsu's lifespan and appeared after the Red Flame Army case was vindicated.