Lv Zhong's disdain for the Thirteen Needles of the Ghost Gate was because it was a derivative acupuncture technique derived from the [Ghost Emperor Needle].
The crucial point being that the creator of the [Thirteen Needles of the Ghost Gate] was a traitorous disciple of the Ghost Gate.
This was documented in the classics passed down in the Lv Family; Lv's ancestors, being close friends with the third generation of Ghost Doctors, knew these secrets well.
Seeing Lv Zhong's indifference to the Thirteen Needles of the Ghost Gate, Liu Weihao naturally refrained from mentioning it again.
