Traveling through the Tang Dynasty, Li Fei picked up a seriously ill little girl named Xiao Shizi. One day, while Li Fei wasn't paying attention, the little girl was fiddling with knives in the kitchen and accidentally cut her hand. Panicked, Li Fei tried to stop the little girl, but he also accidentally cut his finger. The blood dripped into the bowl and, as if by magic, began to melt. Li Fei: "Huh? My biological sister? That's ridiculous?"