Yan Bingyun's assassination of Fan Xian was a plan that had been discussed beforehand. Fan Xian chose to fake his death to protect his and the others 'safety. Fan Xian had discovered the collusion between the Second Prince and Eldest Princess in Northern Qi, as well as their illegal actions. In order to expose the conspiracy behind them and protect the people being threatened, he had discussed this plan with Yan Bingyun. Fan Xian pretended to be dead. This way, he could protect the person the Second Prince was using to threaten him and also find out who had been attacking him from behind. Yan Bingyun's stab at Fan Xian did not kill Fan Xian. It was a play the two had rehearsed beforehand. Therefore, Yan Bingyun assassinated Fan Xian to execute their plan and protect the interests of the Qing Kingdom.

The reason why Yan Bingyun wanted to kill Fan Xian was still unclear. Some people believed that this might have been a plan Fan Xian and Yan Bingyun had discussed in advance to let Fan Xian fake his death and escape. In addition, there were also people who believed that this was for the stability of the Qing Kingdom. Yan Bingyun chose to kill Fan Xian. However, the exact reason and plot needed to be revealed in the second season of Joy of Life. Therefore, we have no way of knowing why Yan Bingyun wanted to kill Fan Xian.
There were many explanations and guesses as to why Yan Bingyun had killed Fan Xian. One explanation was to protect the stability of Qing Kingdom. Fan Xian had discovered the collusion between the Second Prince and Eldest Princess in Northern Qi, as well as their illegal actions. Yan Bingyun might have thought that Fan Xian's actions would be detrimental to the Qing Kingdom, so he chose to stab Fan Xian to protect the safety of the Qing Kingdom. The specific plot and reason might need to be revealed in the second season of Joy of Life.
Yan Bingyun's assassination of Fan Xian took place in the fifteenth chapter of Joy of Life.
As for why Yan Bingyun killed Fan Xian in Joy of Life, there was no definite answer. The ending of the play showed Yan Bingyun suddenly stabbing Fan Xian in the back and saying," This is my decision." Some netizens speculated that this might have something to do with the Second Prince's letter. The letter mentioned that if the Second Prince's matter was exposed, the Qing Kingdom would definitely be in chaos. The Overwatch Council's duty was to ensure that the Qing Kingdom would not be in turmoil. Perhaps the Second Prince had also written in Yan Bingyun's letter that for the safety of the Qing Kingdom, he was ordered to kill Fan Xian. However, the specific reasons and plot details would have to wait for the second season to be revealed.
After Yan Bingyun stabbed Fan Xian, there were many possibilities for the plot to develop. According to the descriptions in documents 2 and 3, Fan Xian did not die. Instead, he was rescued. Yan Bingyun's goal in stabbing Fan Xian was to gain the Second Prince's trust so that he could be a better spy. The details of Fan Xian's subsequent plot after being stabbed by Yan Bingyun required further reading of the novel or watching the TV series Joy of Life to understand.
There were many possibilities for the plot after Yan Bingyun killed Fan Xian. According to the contents of documents 1 and 4, Fan Xian might fake his death and reach an agreement with Yan Bingyun to break out of this situation. Yan Bingyun gained the Second Prince's trust and pretended to rely on the Second Prince to protect Fan Xian as a spy. In addition, Fan Xian might be rescued. Fan Xian and Yan Bingyun had discussed this. Fan Xian had also asked Yan Bingyun if he would help him. However, the specific plot development and ending required further watching the second season of Joy of Life.
As for the specific plot and development after Yan Bingyun killed Fan Xian in Joy of Life, the search results did not provide a definite answer. The search results mentioned that Fan Xian might fake his death and reach an agreement with Yan Bingyun to break the situation; Yan Bingyun had gained the Second Prince's trust and pretended to side with the Second Prince to protect Fan Xian as a spy; Fan Xian might be rescued; Fan Xian and Yan Bingyun had discussed it, and so on. However, the specific plot development and ending required further watching the second season of Joy of Life. Therefore, regarding what happened after Yan Bingyun killed Fan Xian in Joy of Life, the search results did not provide a definite answer.
Fan Xian's resurrection in Joy of Life2 was achieved through the special immortal pills and medicine provided by the Temple and the care of Haitang Duoduo. After Fan Xian was assassinated by Yan Bingyun, Haitang Duoduo saved him and took him to the Temple. The Temple provided immortal pills and medicine to treat Fan Xian's injuries. Fan Xian rested for nearly a month under Haitang Duoduo's care. Then, he informed Wu Zhu to come and rescue him. After Fan Xian was assassinated by Yan Bingyun, Haitang Duoduo saved him.
After Yan Bingyun stabbed Fan Xian, Fan Xian did not die. Instead, he was rescued. Yan Bingyun's goal in stabbing Fan Xian was to gain the Second Prince's trust and protect Fan Xian's life. The specific plot development was not clearly revealed in the search results provided, so the specific follow-up plot after Fan Xian was stabbed by Yan Bingyun could not be determined.
As for the development of the plot after Yan Bingyun killed Fan Xian in Joy of Life, the search results did not provide a definite answer. According to the descriptions of documents 1, 2, 3, 4, 5, and 6, Fan Xian might fake his death and reach an agreement with Yan Bingyun to break the situation. Yan Bingyun gained the Second Prince's trust and pretended to rely on the Second Prince to protect Fan Xian as a spy. After Fan Xian was rescued, he and Yan Bingyun discussed their next course of action. However, the development of the specific plot would still need the audience to continue watching the second season of Joy of Life. As a result, the search results did not provide a definite answer to what happened after Fan Xian was killed by Yan Bingyun.