So Mei Chaofeng wanted to trick Ma Yu into teaching her his Quanzhen internal power method, but he recognized her intent and stopped short after sharing a small portion of it.
However, since Mei was Yang Kang's teacher, and Yang Kang learned exactly the same internal power as Guo Jing did through his other teacher Qiu, why didn't Mei ask Yang Kang to share the Quanzhen method with her?
If Mei asked, do you think Yang would acquiesce? He seems more fond of teacher Mei than teacher Qiu.