[Yes, Yan Bingyun is the Second Prince's man.] In Joy of Life, Yan Bingyun was the head of a secret intelligence agency that the Overwatch Council had placed in Northern Qi. He was a spy responsible for gathering military intelligence. In the plot, Yan Bingyun's mission to Northern Qi as a spy failed and he was eventually betrayed. The person who betrayed him was the Second Prince's subordinate. In addition, some search results mentioned that the Second Prince and the Eldest Princess were in cahoots. They supported and used Yan Bingyun together. Therefore, based on the information provided, it could be confirmed that Yan Bingyun was the Second Prince's man.

Yan Bingyun was not the Second Prince's man. He had chosen the Second Prince to protect Fan Xian. Furthermore, his choice had been discussed. His goal was to deal with the Second Prince. Therefore, Yan Bingyun was not the Second Prince's man.
The content of the letter the Second Prince wrote to Yan Bingyun was about the Qing court situation and Fan Xian's return to court. The letter mentioned that Fan Xian's return to court would cause unrest in the Qing Kingdom and make it easy for Northern Qi to use him. The Second Prince told Yan Bingyun the ins and outs of the matter and expressed that Fan Xian would fight to the death with him after he returned. Yan Bingyun was worried about Fan Xian's return. He believed that this would trigger a great battle and make the Qing court unstable. However, what he did not know was that if Fan Xian died in Qing Kingdom, no one in the Qing capital would survive. Thus, if Yan Bingyun had known this earlier, he might not have attacked Fan Xian. As for the specific content of the letter, the search results did not provide detailed information, so it was impossible to give a more specific answer.
The relationship between Yan Bingyun and the Second Prince was complicated and tense in Joy of Life. The Second Prince had once sent Xie Bian to threaten Fan Xian, asking him to rely on him. He had also threatened Yan Bingyun. If Fan Xian did not agree, Yan Bingyun would join forces with Xie Bian to deal with Fan Xian. However, Fan Xian did not compromise. Instead, he colluded with Yan Bingyun. The content of the letter the Second Prince wrote to Yan Bingyun was about the Qing court situation and Fan Xian's return to court. The letter mentioned that Fan Xian's return to court would cause unrest in the Qing Kingdom and make it easy for Northern Qi to use him. Yan Bingyun was worried about Fan Xian's return. Yan Bingyun's sword stabbed into Fan Xian's body, but Fan Xian was not truly dead. The Second Prince expressed his appreciation for Fan Xian's " death " and promised to do what Yan Bingyun had requested. However, there was no clear answer as to whether Yan Bingyun had really sided with the Second Prince.
The relationship between Yan Bingyun and the Second Prince was complicated and tense in Joy of Life. The Second Prince had once sent Xie Bian to threaten Fan Xian, asking him to rely on him. He had also threatened Yan Bingyun. If Fan Xian did not agree, Yan Bingyun would join forces with Xie Bian to deal with Fan Xian. However, Fan Xian did not compromise. Instead, he colluded with Yan Bingyun. In the second season, the grudge between Fan Xian and the Second Prince had just begun. The Second Prince had given Fan Xian three " gifts," including candied haws, the title deed to the bookstore, and Fei Jie's rubber gloves. This was seen as the Second Prince's provocation to Fan Xian, indicating that Fan Xian would become enemies with the Second Prince. However, there was no specific information about the Second Prince and Yan Bingyun's ending or the development between them.
The relationship between the Second Prince and Yan Bingyun was complicated and tense. In the " Joy of Life," the Second Prince had sent Xie Bian to threaten Fan Xian, asking him to join him. He had also threatened Yan Bingyun. If Fan Xian did not agree, Yan Bingyun would join forces with Xie Bian to deal with Fan Xian. However, Fan Xian did not compromise. Instead, he colluded with Yan Bingyun. Fan Xian pretended that Yan Bingyun had pierced his abdomen to protect Yan Bingyun's identity and Fan Xian's life. Therefore, the Second Prince's letter to Yan Bingyun might have contained threats or roping him in, but the specific content of the letter was not mentioned. In short, the relationship between the Second Prince and Yan Bingyun was a complicated plot full of deception and trickery.
In the original " Joy of Life," Yan Bingyun was not Fan Xian's man. In the play, Yan Bingyun was Fan Xian's classmate and good friend. He was a meticulous and deeply hidden person. On the surface, he was a spy sent by the Qing Kingdom to Northern Qi. In reality, he was Xiao En's grandson.
Yes, Yan Bingyun was Fan Xian's man. He was Fan Xian's right-hand man. He had helped Fan Xian plan strategies and delivered many useful secret reports to the Qing Kingdom. Although there was a scene in the play where Yan Bingyun seemed to stab Fan Xian, in reality, this might have been a scheme jointly planned by Fan Xian and Yan Bingyun to deceive the Second Prince. Yan Bingyun had feelings for Fan Xian. He had helped Fan Xian collect his body and saved his life. Thus, it could be confirmed that Yan Bingyun was Fan Xian's man.
Yan Bingyun was Fan Xian's man. In Joy of Life, Yan Bingyun was the eldest son of Yan Ruohai, the head of the Fourth Bureau of the Overwatch Council. He was also Fan Xian's friend and companion. He had been sent to Northern Qi as a hostage. He had met Fan Xian in Northern Qi and experienced many stories together. Although there were some plots that hinted that Yan Bingyun might kill Fan Xian, based on the information provided in the search results, it was impossible to determine whether he had really killed Fan Xian.
Yan Bingyun was Fan Xian's man. In the original work of " Celebrating Years," Yan Bingyun was Fan Xian's right-hand man and helped him plan. Although there was a scene in the drama where Yan Bingyun seemed to stab Fan Xian, in reality, this might have been a scheme jointly planned by Fan Xian and Yan Bingyun to deceive the Second Prince. Therefore, based on the information provided, it could be confirmed that Yan Bingyun was Fan Xian's man.
Yan Bingyun was Fan Xian's right-hand man, but there was also a complicated relationship between them. Yan Bingyun had originally been sent to Northern Qi to protect Fan Xian, but on the way back to the Qing Kingdom, he had stabbed Fan Xian. In reality, Yan Bingyun was an important helper for Fan Xian. The reason he was sent to Northern Qi was to stop someone from assassinating Fan Xian. Therefore, although they seemed to be on opposite sides on the surface, they were actually working together. Therefore, it could be said that Yan Bingyun was Fan Xian's man.