In Joy of Life, Xiao En and Ku He were partners and friends. They went through many hardships together and finally found the temple and rescued Ye Qingmei. Although Ku He had sent people to assassinate Xiao En, it was because Ku He wanted to hide the secret of the temple and was afraid that Xiao En would leak it. In general, Ku He and Xiao En were partners who worked together for the same goal, and their relationship was friendly.

Xiao En and Ku He were partners and friends in Joy of Life. They went through many hardships together and finally found the temple and rescued Ye Qingmei. Although Ku He had sent people to assassinate Xiao En, it was because Ku He wanted to hide the secret of the temple and was afraid that Xiao En would leak it. The search results did not provide clear information about the relationship between Xiao En and Ku He, as well as the detailed background and interactions between them. Therefore, there was no clear answer about their relationship in the search results.
Ku He and Xiao En were both important characters in Joy of Life. They were both one of the Four Grandmasters. Ku He was the Imperial Advisor of the Beiqi Kingdom. He cultivated the Tianyi Dao Heart Technique and became a Great Grandmaster. Xiao En was the partner who had rescued Ye Qingmei from the temple with Ku He, even though his martial arts had only been cultivated to the ninth-level. According to the information provided, Ku He was described as a very powerful character in the play, while Xiao En's strength was relatively weak. Thus, Ku He was considered even more powerful in Joy of Life.
The reason Xiao En and Ku He were in the temple was because they had gone through many hardships together to find the temple and rescue Ye Qingmei. The two of them were witnesses to the temple and knew its location and secrets. Ku He did not want the secret of the temple to be leaked, so he sent people to assassinate Xiao En to prevent him from revealing the secret of the temple. Xiao En knew that the secret of the Temple could pose a threat to Ku He, so Ku He hoped that Xiao En would not return to Northern Qi alive. This was their relationship and motive in the temple.
Fan Xian and Xiao En did not have any real kinship in " Celebrating Years." Xiao En had mistakenly thought that Fan Xian was his grandson. It was a trick Chen Pingping had set up to get out of Xiao En's heart about the secret of the Temple. After Chen Pingping captured Xiao En, he often revealed information about his grandson to Xiao En, making him believe that he still had a grandson in the world. Fan Xian did not know Xiao En, so he answered Xiao En's questions truthfully. In the process of escorting Xiao En back to Northern Qi, Xiao En revealed to Fan Xian the secret he had guarded for decades and told Fan Xian about his own origins. Thus, although Fan Xian and Xiao En were not truly related, their contact and communication had a major impact on Fan Xian's growth and understanding of his past.
In Joy of Life, Xiao En's grandson was Yan Bingyun. Chen Pingping and the Qing Emperor had misled Xiao En into thinking that Fan Xian was his grandson in order to find out his secret about the Temple. However, Fan Xian finally discovered the truth. Yan Bingyun was Xiao En's grandson. Yan Bingyun had been groomed to be loyal only to the Qing Kingdom and had a deep hatred for Northern Qi. Although the original did not explicitly state whether Xiao En had a grandson or the relationship between Yan Bingyun and Xiao En, in the TV series, Yan Bingyun was the grandson of Xiao En, the spy leader of Northern Qi.
Joy of Life's Xiao En's grandson was Yan Bingyun. Yan Bingyun was the son of Ye Qingmei and the Qing Emperor. He was also the son of Chen Pingping's conspiracy. He had been placed outside by Xiao En and was loyal to the Qing Kingdom. He had a deep hatred for Northern Qi. Although Fan Xian's identity had always been suspicious, based on his age, identity, and the clues in the plot, Yan Bingyun was more likely to be Xiao En's grandson. Therefore, it could be confirmed that Xiao En's grandson was Yan Bingyun.
In Joy of Life, Xiao En's martial arts level was at the level of a rank-nine martial artist. Although he had taken poison for twenty years and was seriously injured, he could still fight his opponent. Xiao En was an old man in Northern Qi. He was in charge of secret intelligence and was also Shang Shanhu's foster father. He had been imprisoned by Chen Pingping for twenty years and was filled with hatred for Chen Pingping and the others. Sean was described as a legendary character in the play, with a special identity and a complicated personality. While he was imprisoned, he could still use Fan Xian's words to speculate about the current situation. However, there was no clear information about Sean's specific strength and his skill in the play, so he could not give a more detailed answer.
In Joy of Life, Xiao En was an old man from Northern Qi, the person in charge of secret intelligence, and Shang Shanhu's foster father. He had been imprisoned by Chen Pingping for 20 years and had a grudge against Chen Pingping and the others. Sean was an important villain and played a key role in the plot. After he was escorted back to Northern Qi by Fan Xian, he suffered heavy torture and secret imprisonment. In the end, Xiao En died from excessive blood loss. Before he died, he revealed to Fan Xian the secrets he had hidden for many years, including the true existence of the Temple and Ye Qingmei's identity.
In Joy of Life, Xiao En was the grandson of Xiao En, the spy leader of Northern Qi. Yan Bingyun's mother was a prostitute. Xiao En was secretly groomed by the Overwatch Council and became the head of the Qing spies lurking in Northern Qi. He played an important role in the play and was described as a tragic spy who had experienced many hardships and tragic encounters. In the end, Xiao En died from excessive blood loss.
Sean was portrayed as a very powerful character in the TV series Joy of Life. He was the person in charge of Northern Qi's secret intelligence. He was set to be the guide for Fan Xian's mother, Ye Qingmei. Although he had been imprisoned for 20 years, he was still a powerful and awe-inspiring key figure. Xiao En was described as a person who killed people like flies. His martial arts cultivation was very high. After being imprisoned by Chen Pingping for 20 years, he could still use Fan Xian's words to speculate on the current situation. However, Sean's strength was not shown in detail in the play, so the specific level of strength could not be determined.