Hai Yan's original work," What Can I Use to Save You and My Lover?" How Did Zhu Siping Die? The new version was about suicide, while the old version was about Long Xiaoyu killing…What did the original novel say?

[I don't understand. Since the new version of Zhu Siping gave herself the last knife, why did Long Xiaoyu keep the weapon?] Not throwing it away but hiding it on the roof…illogical, incomprehensible! Since he was the one who gave him the last stab and Long Xiaoyu wasn't the one who killed him, why was Long Xiaoyu still captured in the end? The old version was easy to understand. The last stick was given by Long Xiaoyu. She committed suicide because of guilt and guilt towards Siping. It was understandable. The reason why he wanted to kill Si Ping was also understandable. Why was the plot so different from the old version? Which one was more faithful to the original novel? Who had read the original novel? Thank you so much!