After Yan Bingyun stabbed Fan Xian, Fan Xian did not die. Instead, he was rescued. After Fan Xian checked the palace treasury accounts in Northern Qi, he discovered the Second Prince and Eldest Princess 'behind-the-scenes instigation. This made Fan Xian decide to return to Jingdou to investigate this matter thoroughly. On the way back to the Qing Kingdom, Fan Xian asked Yan Bingyun if he would help him, but Yan Bingyun did not answer. The details of Fan Xian's subsequent plot after being stabbed by Yan Bingyun needed to be further understood by watching the TV series Joy of Life.

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.
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.
The plot of Fan Xian being stabbed by Yan Bingyun did not appear in the original novel of Joy of Life. This plot was adapted from the TV series Joy of Life. The purpose was to make Yan Bingyun gain the trust of the Second Prince so that he could be a better spy. Therefore, it was impossible to determine which chapter of the novel Fan Xian was stabbed by Yan Bingyun.
The first season of the celebration ended and Fan Xian was not stabbed to death by Yan Bingyun. At the end of the first season, Fan Xian and Yan Bingyun had a fierce battle, but in the end, Fan Xian successfully escaped Yan Bingyun's pursuit. Although Yan Bingyun had been defeated, he still held a grudge against Fan Xian, ready to take revenge at any time.
There were many explanations for why Yan Bingyun had stabbed Fan Xian. One possibility was to protect the safety of the Qing Kingdom. Yan Bingyun was a loyal member of the Qing Kingdom. He might have stabbed Fan Xian to prevent the Qing Kingdom from falling into internal strife. 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 done so to prevent Fan Xian from disrupting the Qing Kingdom's government. The other possibility was that Yan Bingyun wanted to express his inner feelings. His assassination of Fan Xian was only a formality. His true goal was to get in touch with the Second Prince. Yan Bingyun believed that the Second Prince had colluded with the Eldest Princess, embezzled the palace treasury's property, and had some unclear connections with the Northern Qi court officials. These actions were all despicable. Assassinating Fan Xian was only to make clear his position. The prerequisite for being loyal to the Qing Emperor was not to do anything that would harm the interests of the Qing Kingdom. In addition, according to the search results, Fan Xian was not truly dead. In the subsequent developments, Yan Bingyun gained the Second Prince's trust and pretended to rely on the Second Prince to be a spy for Fan Xian. In the end, Fan Xian was rescued. Thus, Yan Bingyun stabbing Fan Xian was only a temporary facade. The story that followed would be even more exciting.
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.
In the original story of Joy of Life, Yan Bingyun stabbed Fan Xian to protect him. At the end of the novel, Yan Bingyun and Fan Xian encountered an assassination attempt by the Second Prince in the Qing Temple. When the Second Prince's people surrounded Fan Xian, Yan Bingyun used his sword to pierce Fan Xian's body. Yan Bingyun had done this because he had received a secret order from Chen Pingping to kill Fan Xian. He believed Fan Xian was a potential threat. Only by killing him could the safety of the Qing Kingdom be guaranteed. However, after Fan Xian fell, Yan Bingyun said to him," This is our first and last cooperation." This made Fan Xian and the readers feel very surprised. In the TV series, the reason why Yan Bingyun stabbed Fan Xian had not been clearly explained. They needed to wait for the second season's plot to be broadcast.
In the TV series Joy of Life, Yan Bingyun stabbed Fan Xian because he wanted to protect the safety of Qing Kingdom. The Second Prince had colluded with the Northern Qi people. Fan Xian and Yan Bingyun discovered this fact and planned to punish the Second Prince. However, they were surrounded by the Second Prince's men and the situation was urgent. In order to let the others escape, Yan Bingyun chose to stab Fan Xian and sacrifice himself to save the others. This action was also to make the Second Prince trust Yan Bingyun more, so that Yan Bingyun could better carry out his undercover mission. Fan Xian and Yan Bingyun had discussed this plan in advance. Fan Xian faked his death so that he could more smoothly do what he wanted to do. Thus, Yan Bingyun had stabbed Fan Xian out of consideration for protecting the Qing Kingdom and Fan Xian.
There were many explanations and speculations about why Yan Bingyun had stabbed Fan Xian in Joy of Life. 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 other explanation was that Yan Bingyun had helped Fan Xian fake his death in order to protect himself and escape. However, the specific plot and reason may require further watching the series or reading the original work to get an accurate answer. Therefore, the search results provided did not clearly mention the specific reason why Yan Bingyun had stabbed Fan Xian in the end.