Appraisers and competent ones at that, could be considered jacks of all trades and could be considered geniuses in their own might because of the wide array of knowledge and skills they had. One appraiser could have knowledge about beast taming, alchemy, weapon refinement, geomancy, and spirit stone survey and mining. The knowledge they had on the subject would not be rudimentary either but would be deep and vast even extending to lost techniques.
Almost every competent appraiser would have knowledge in different subjects at base value and then specialize in certain subjects. Yang Qing was confident in his knowledge of certain subjects such as medicine, formation arrays, and the deciphering of the grade of broken cultivation arts.
