Xiaozhai is a disciple of the Xuan Huang Sect, yet she also practiced the Thunder rites taught by Sa Shoujian.
Sa Shoujian initially studied medicine but harmed someone due to a medicinal error and thus gave up medicine to pursue the Tao. Later, he met Wang Wenqing, Lin Lingsu, and the thirtieth-generation Heavenly Master of Mount Longhu, Zhang Jixian, who each taught him a technique: the Jujube Spell Technique, Quick Disease-Dispelling Technique, and Thunder rites.
Eh, looking at it this way, Sa Shoujian is really a son of this plane.
In any case, Sa Shoujian, deeply linked with the Shenxiao Sect, went on to compose Shenxiao's Tinkling Jade Book of Great Thunder, which was then learned by Jiang Xiaozhai. So, she has become a key figure, while Cao Wenyi, for some unknown reason, does not allow her to leave, probably holding some secrets.
