There was a deeper meaning to Xue Meining's question.
On one hand, ever since Ling Yun demonstrated the Nine Needles of The Spiritual Pivot, Xue Meining had a sudden realization that she was lacking in confidence whenever she spoke to Ling Yun. Thus, she was trying to increase her self-worth by using her grandfather's status and identity.
She wanted Ling Yun to acknowledge her status and worth so he would not look down on her.
On the other hand, she was really intrigued by why this shameless, stingy and petty character would let go of such a golden opportunity instead of cashing in on it.
However, the following answer from Ling Yun angered her tremendously.
"Yeah, I know. Didn't you tell me before? Your grandfather is an old traditional Chinese medicine practitioner. Pretty decent skills, but he's a cheater."
Decent skills? Cheater?