Please Believe Me - S1.E18

After discovering that Lu Luo has become a Butterfly Slave because of her, Bao Zhu deliberately or inadvertently distances herself from Ling Chang Jin. Concerned about Bao Zhu's unimproved condition, Ling Chang Jin insists on taking her to see a doctor for treatment. While doing so, he notices a wound on Bao Zhu's hand and realizes that she had been extracting blood to give to Lu Luo.