At present, there was no clear information that Su Baiyi and Nangong Xi 'er had offspring. In the anime " Jun You Yun," it was not directly stated whether they had children. Therefore, there was no definite answer to the question of whether Su Baiyi and Nangong Xi 'er had descendants.

Nangong Xi 'er was the daughter of Xie Kanhua and Nangong Yuwen.
Nangong Xi 'er finally achieved immortality. According to the plot of " Song of Youth," Nangong Xi 'er had lived to more than a hundred years old and had reached a state of selflessness, leaving the troubles of the secular world. Although some of the search results mentioned the relationship between Su Baiyi and Nangong Xi 'er and whether they had a child, they did not answer the question of whether Nangong Xi' er lived forever. Therefore, based on the information provided, it could be concluded that Nangong Xi 'er had achieved immortality.
Nangong Xi 'er was the heroine in Zhou Munan's martial arts novel " Jun Youyun " and the anime of the same name. She was the female lead of " Jun You Yun ". She was adopted by the school when she was young and taught to be an adult. Although he knew that he was a descendant of the Nangong Family, he did not know why he had become an orphan. In order to pursue the mystery of his birth, he went down the mountain. Although she was armed like a proud rose with thorns on the outside, she always had the appearance of a cold big sister. In fact, after taking off her disguise, she looked like a little bird. She was skilled in martial arts and tried her best to protect Su Baiyi.
Su Baiyi's father was the Grand Palace Master of the Upper Forest Heavenly Palace, Su Han.
Xie Kanhua was Nangong Xi 'er's brother-in-law.
In the ending of the Monster List, Feng Xi and Su Jiu 'er were together.
Nangong Qianrou was the descendant of the first superintendent. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!
In the setting of " The Monster List," Feng Xi had died to protect the common people in every life. There was no clear indication that he could die directly for Su Jiu 'er. However, Su Jiu 'er and Feng Xi had been together for several lifetimes. Su Jiu' er had been pursuing Feng Xi for thousands of years. Every time Feng Xi reincarnated, he would forget about his previous life, while Su Jiu 'er had always remembered and accompanied him to protect him. In the process of Feng Xi reincarnating and fulfilling his mission to protect the common people, there were complicated emotional entanglements between him and Su Jiu' er. Although it was not explicitly stated that he died for Su Jiu 'er, when Feng Xi faced the mission to protect the common people and his feelings for Su Jiu' er, His death might have had an indirect emotional connection with Su Jiu 'er.
In the finale of " The Monster List," Feng Xi had a high fever. After Su Jiu 'er stuffed a Dragon's Tear blue bead worth 50,000 yuan into his mouth, Feng Xi miraculously recovered. At the same time, a new monster appeared, the Dragon Lady appeared, the Student Council President appeared, and the Yang Eye was exposed. In the end, Feng Xi and Su Jiu 'er got together.