Who killed Qin Yanping and Tao Binger in the girls' dormitory?

Both Qin and Tao Binger were hypnotized by He Jianhui with blood jade with hypnotic effect. The former cut her wrists in the dormitory and the latter died of gas poisoning. He Jianhui used their inner weakness to make them commit suicide (the former blamed himself for accidentally injuring his cousin when he was a child, which led to his death; The latter felt lonely because of Qin's death and was afraid of getting bad results by asking the gods to tell fortune. ) But when He Jianhui was planning to frame and kill Tao Europe, their teacher Qin Yue knew it, but she didn't stop it for money (trying to get his property after He Jianhui was exposed), so why do you think Qin Yue was also an accomplice in killing Tao Europe? I hope the landlord will give me some points for such a detailed answer. No one can be more specific than me.