At the end of the novel "Hidden Corner", both Pupu and Ding Hao are poisoned by Zhang Dongsheng, while Zhu Chaoyang kills Zhang Dongsheng and survives. In fact, Zhu Chaoyang was also an accomplice in the deaths of Pupu and Kiway. He knew that the drink Zhang Dongsheng gave them was poisonous, but he didn't tell the other two partners, which led to the tragedy.

Pupu and Ding Hao are friends who grew up in an orphanage. At that time, Pupu was often bullied by other children in the orphanage, and Ding Hao saw that he would protect Pupu.

Later, Pupu and Ding Hao met Zhu Chaoyang. Puppy envies Zhu Chaoyang and wants to be like Zhu Chaoyang. In fact, due to the change of family and the eccentricity of his father, Zhu Chaoyang experienced great psychological changes. He is no longer a simple and kind child.

In the TV series, Zhu Jingjing slipped downstairs, but in the novel, Zhu Jingjing was pushed by Zhu Chaoyang. This matter was known by Pupu and Ding Hao, and three people filmed the video of Zhang Dongsheng killing his parents-in-law, so there was the back story. Finally, Zhu Chaoyang was impeded, and Zhang Dongsheng was used to kill Pupu and Ding Hao.