《Substitute》E15
Thieves emerge layer by layer
Lin Yu came to Su Xichen's room. He found out that Su Xichen stole the Guigu Seal and was the same person who killed Lao Liu and framed Bai Chu.
After Lin Yu left, Su Xichen asked Qingqing why he wanted to harm Bai Chu when he just asked her to steal the Guigu Seal.Qingqing didn't want to implicate Su Xichen, so she sent medicine to Su Xichen while the housekeeper Wang Yilai was there, deliberately knocked over the medicine bowl, and assassinated Wang Yi on his way to change medicine, but was captured by Wang Yi instead.
