In Joy of Life, Fan Xian's assassin was Lin Gong. Lin Gong was the murderer ordered by the Eldest Princess to plot the assassination on Niulan Street. There were three people behind Fan Xian's return to the capital. They were the Second Prince, the Eldest Princess, and Lin Gong. The Second Prince assassinated Fan Xian because he did not want Fan Xian to control the palace treasury. The Eldest Princess did not want Fan Xian to control the palace treasury, nor did she want Lin Wan 'er to marry him.

The murderer in Joy of Life was Lin Gong. Lin Gong was the murderer ordered by the Eldest Princess, Li Yunrui. He planned the assassination on Niulan Street. When Fan Xian learned of this, he decided to kill him, but Wu Zhu stopped him and personally left the capital to kill Lin Gong. Lin Gong was the murderer that Si Lili confessed in Joy of Life.
The real culprit behind Teng Zijing in Joy of Life was Si Lili. Si Lili gave the token to the murderer, Cheng Jushu, and instructed him to assassinate Fan Xian. Teng Zijing had lost his life to protect Fan Xian. Hence, Si Lili was the real culprit behind Teng Zijing.
In Joy of Life, the real culprit behind Teng Zijing was Si Lili. She gave the token to the murderer, Cheng Jushu, and instructed him to assassinate Fan Xian. Therefore, Teng Zijing's death was planned by Si Lili.
The real murderer of the Niulan Street Case in Joy of Life was Lin Gong. Lin Gong was a member of the Prince's faction and was thought to be the mastermind behind Fan Xian's assassination at Niulan Street. His motive was not to let Fan Xian control the palace treasury and not to let Lin Wan 'er marry Fan Xian. In addition, there were some signs that Lin Gong might have a larger force behind him. Therefore, according to the information provided, Lin Gong was the real murderer of the Niulan Street Case.
There were two theories about the real culprit behind Teng Zijing in Joy of Life. One theory was that Si Lili had given the token to the murderer, Cheng Jushu, and instructed him to assassinate Fan Xian. Teng Zijing had lost his life to protect Fan Xian. The other theory was that the Second Prince had invited Fan Xian to Drunken Immortal Residence. Fan Xian was assassinated by Cheng Jushu on his way to the appointment, and Teng Zijing was killed in order to protect Fan Xian. However, these results did not provide a clear answer, so it was impossible to determine whether the real culprit behind Teng Zijing was Si Lili or the Second Prince.
There were two explanations for Teng Zijing's role in Joy of Life. One theory was that Si Lili had given the token to the murderer, Cheng Jushu, and instructed him to assassinate Fan Xian. Teng Zijing had lost his life to protect Fan Xian. The other theory was that the Second Prince had invited Fan Xian to Drunken Immortal Residence. Fan Xian was assassinated by Cheng Jushu on his way to the appointment, and Teng Zijing was killed in order to protect Fan Xian. However, these results did not provide a clear answer, so it was impossible to determine whether the real culprit behind Teng Zijing was Si Lili or the Second Prince.
The information about the real murderer behind Teng Zi and Jing Mu in Joy of Life was inconsistent. Some of the results mentioned that Si Lili was the real murderer behind Teng Zi and Jing Mu. She gave the token to the murderer Cheng Jushu and instructed him to assassinate Fan Xian. Fan Xian and Wang Qinian finally found Si Lili's true identity. However, there were also some results that mentioned that the Second Prince was one of the true murderers behind the scenes. He invited Fan Xian to the Drunken Immortal Residence. On the way to the appointment, Fan Xian was assassinated by Cheng Jushu. Teng Zijing was brutally killed to protect Fan Xian. However, these results did not provide a clear answer, so it was impossible to determine whether the real culprit behind Teng Zijing was Si Lili or the Second Prince. Therefore, there was currently no conclusive answer to the question of Teng Zi, Jing, and Mu Hou being the real murderer.
The real murderer behind Teng Zijing in "Celebrating Years" was Si Lili. Si Lili gave the token to the murderer, Cheng Jushu, and instructed him to assassinate Fan Xian. Teng Zijing had lost his life to protect Fan Xian. Fan Xian and Wang Qinian worked together to track down the fleeing Si Lili and finally discovered her true identity. In addition, some search results mentioned that the Second Prince was also one of the true murderers behind the scenes. He invited Fan Xian to Drunken Immortal House. On the way to the appointment, Fan Xian was assassinated by Cheng Jushu. Teng Zijing was brutally killed to protect Fan Xian. However, these results did not provide a clear answer, so it was impossible to determine whether the real culprit behind Teng Zijing was Si Lili or the Second Prince.
Fan Xian and Teng Zijing were assassinated by Cheng Jushu on their way to the Second Prince's banquet. Teng Zijing sacrificed himself to protect Fan Xian. Fan Xian had always thought that someone had followed his tracks, which had led to his assassination attempt. In reality, the person who had invited him to the Drunken Immortal Residence that day was the Second Prince. The real culprit behind the scenes was the Eldest Princess Li Yunrui. She had ordered Cheng Jushu to assassinate Fan Xian. In order to find the real murderer, Fan Xian and Wang Qinian worked together to track down the fleeing Si Lili. In the end, Fan Xian discovered the Eldest Princess 'plot and decided to chase her out of Jingdou. Thus, Eldest Princess Li Yunrui was the real culprit behind Teng Zijing's death.
The real culprit behind Teng Zijing's TV drama, Joy of Life, was Si Lili. Si Lili gave the token to the murderer, Cheng Jushu, and instructed him to assassinate Fan Xian. Teng Zijing had lost his life to protect Fan Xian. Fan Xian and Wang Qinian finally found Si Lili's true identity. Therefore, Si Lili was the real murderer behind Teng Zi and Jing Mu.