Those two have some strange connection to Xiao Yao Pai that's never been explained to my satisfaction, either in the novel or elsewhere. How did Jiumozhi ever learn Xiao Wu Xiang Gong? And, how did Sweeper Monk immediately recognize that Jiumozhi used Xiao Wu Xiang Gong. Neither was explained at ALL in the book, and are a great mystery. The only people who knew XWXG was Wuyazi and Li Qiushui. Li Qiushui was in Xi Xia, not Tu Bo, and taught it to no one, to my knowledge. Wuyazi was an invalid for decades, and never taught that skill (to the best of my knowledge) to any of his disciples. Tien Shan Tong Lao used BH6HWWDZG, not practicing XWXG. Even the names "XWXG" and "BMSG" are known very very rarely; Tien Shan Tong Lao remarked that one of her SUBORDINATES, the leader of one of the 72 caves/isles, was impressive because he knew that name. Outside of her circle, how could others possibly know not only the name, but be able to recognize it with ease?
Where did Jiumozhi learn it from?
And how could Sweeper Monk recognize it, when he had been sweeping the floors of Shaolin for several decades, never leaving?
Personally, I swear Sweeper Monk had some relation with Xiao Yao Pai. Maybe WYZ/LQS/TSTL's teacher :P