After checking the forum, they finally realized who Du Fang Heng was.
Du Fang Heng was one of the Three Immortal Ladies' named disciple, Shen Wugou, and her fate in the original story was quite miserable.
However, even though she was a miserable and impoverished NPC, she was still Shen Wugou's disciple, even if just in name. This Immortal Shen Wugou was Deng Yin's wife, and she had accepted many disciples.
Since the last key item for the Long Leg Sister's level 10 flying sword was in Du Fang Heng's hands, the ways to acquire it were basically to snatch, deceive, or exchange.
After carefully estimating Du Fang Heng's strength, it was guessed that she was at least level 160 or above, and the weapons she possessed were not weak. She was definitely not a poor and destitute NPC.
With Ye Rong and Long Leg Sister joining forces, the possibility of defeating Du Fang Heng was not great, so forcibly seizing the item could essentially be abandoned.