Who is Princess Beiliang in "Knife in the Snow"?

Wu Su.

Princess Wu Su of Beiliang, from the tomb of Wujia sword, was crowned by the previous generation of Wujia sword. Virtual characters in the novel Sword in the Snow.

Zhao Yutai is his sword maid. His father is both a sword armor and a book armor. For Xu Xiaoyi, he broke the sword burial with the Wu family. This led to the assassination of Xu Fengnian by the current sword crown Wu. Bury the sword in Qingcheng Mountain. The Western Wall was dressed in white, and personally sounded the drums. The dragons and dragons were mixed, and the drums were thunderous. The drums in the West Chu were endless, and the world was moved by it. Wang Linquan, the former head of Beiliang in Laoshan Mountain, worships the Buddha White Jade Guanyin, which is based on the princess's appearance.

The root cause of Wu Su's departure:

Wu Su, who was pregnant, went into the palace alone without telling Xiao Xu, in order to break the game that should be aimed at Xiao Xu. During World War I, Wu Su entered the land god fairyland, which made the female sword fairy Deux retreat after her success, and made the Liyang royal family too scared to attack Xiao Xu again. But it also left the root of the disease, gave birth to the sugar elephant and died.