New Branch, Dead Wood - S1.E10

Tang Qian Yue is drawn to Bao Zhu's blood and turns into a Butterfly Slave. However, Tang Qian Yue shows up not to harm Bao Zhu but to safeguard her from the assaults by other Butterfly Slaves. Ling Chang Feng manages to temporarily restore Tang Qian Yue to her original state using the black peonies' essential oil, but this incident is witnessed by Ling Chang Jin, leading him to harbor suspicions regarding Tang Qian Yue's true identity.