When Xu Feng met with the King of Jing'an for the first time, he had been absent-mindedly staring at Pei Nanwei, whom the King of Jing'an loved very much, and the expression he showed even wanted to tease Pei Nanwei in person, and afterwards Xu Fengnian even sent a bracelet and a date letter to Pei Nanwei, which was undoubtedly an insult to the King of Jing'an. However, the King of Jing'an still let Pei Nanwei go to the reed swing to meet Xu Fengnian privately, and from the follow-up plot, Pei Nanwei did not return to the side of the King of Jing'an, but instead followed Xu Fengnian to break into the rivers and lakes, and the King of Jing'an gave Pei Nanwei to Xu Fengnian, which was too clever.

The King of Jing'an understood that Xu Fengnian's passing through Qingzhou gave him a big problem, Xu Xiao as a thorn in the eye of the imperial court, the imperial court did not want Xu Xiao to find an heir to the Northern Starling Army, so killing Xu Fengnian's northern starling would be chaotic, and the imperial court would dare to do something to Xu Xiao, so the imperial court hoped to leave the burden of killing Xu Fengnian on the side of the King of Jing'an. If Xu Fengnian walked out of Qingzhou alive, the imperial court would suspect that the King of Jing'an had allied with Xu Xiao and deliberately let Xu Fengnian go, and the first target of the imperial court in the future would become the King of Jing'an. Originally, king Jing'an and Xu Xiao both made a deal and let Wang Linquan's family die to protect Xu Fengnian, but Xu Fengnian let Wang Linquan's family go, which made King Jing'an have to take up a butcher's knife and do something to Xu Fengnian.
Xu Fengnian also understood that the move of letting Go of Wang Linquan would make the King of Jing'an very passive, without Wang Linquan as a substitute ghost, the King of Jing'an would have to attack him, but the risks in this The King of Jing'an also had to consider, so the King of Jing'an thought of a trick, and gave his beloved concubine Pei Nanwei to Xu Fengnian, and the "sending" in this had a lot of articles! It was not so much about sending Pei Nanwei rather about letting Pei Nanwei pretend to assassinate Xu Fengnian. When the students of the Shangyin Xuegong took the Fu general Hongjia and Wang Mingyin to assassinate Xu Fengnian, if the army of the King of Jing'an rushed over in time, even if Li Chungang had three heads and six arms, under the siege of so many people, Xu Fengnian would not be able to escape death, but from the follow-up plot, the Fu general Hongjia fell one by one, Wang Mingyin was defeated, the assassination of the girl failed, and the King of Jing'an came to support with the army, which showed that the King of Jing'an did not want to attack Xu Fengnian at all, and Pei Nanwei's assassination plan and his army came only to give the outside world an illusion —— The King of Jing'an had an attempt to assassinate Xu Fengnian, but the assassination failed.
If the king of Jing'an did not make this play, the court would blame him, and even think that he was allied with Xu Xiao, which was undoubtedly putting himself in danger. Now that he had given his beloved concubine to Xu Fengnian, he had the excuse that Pei Nan's assassination had failed, and he was abducted by Xu Fengnian afterwards, creating a false revenge for taking his wife, thus cutting off the suspicion of the imperial court against him.
As for Pei Nanwei, the King of Jing'an also knew that her heart was not in his place, originally Pei Nanwei was snatched from his son by the King of Jing'an, which also made his son very dissatisfied with him, leaving a Pei Nanwei by their side would aggravate the tense relationship between him and his son. Sending away a Pei Nanwei can not only ease the relationship with his son, but also keep his throne, and also sell a favor to Xu Xiao, and the King of Jing'an has done a very clever trick.