Every Xiu Xing method had to have a corresponding Qi operating method. If one completely understood it, one could express the true force of his/her xiu xing method. Her problem, was that she had no way to operate the Qi inside her body according to the book.
Yet that night when the demon elite attempts to assassinate her, Chen Chang Sheng used a few words to prove that he could solve this problem. For her there was at least a possibility.