According to novel, it should have been Yin Ziqi attempting suicide. But in drama, I think Xuan Ren's under hypnosis and shot Fu ZiYu. When Jian Yao said 'Xuan Ren, I'm Yao Yao.' He tried to break the hypnosis by shooting himself. In the novel, both Yin Ziqi and Fu Ziyu didn't die and didn't have an affair too. And also, Jian Yao is tortured with both drugs and got whipped in the novel. In the novel, she wrote BJY a letter but in drama, it's gonna be video message. Yi Yang was rescued only at the end.