Leader of the Qīng Bāng, brother of Pān Yù-Líng, also a close friend of Kenshiro.

Spoiler

While Kenshiro was away from Shanghai, his Triad gang members were killed one by one. He was tortured for a period of time by Wú Dōng-Lái, thus losing his feet from flesh eating rats. Kenshiro saved his life by amputating his already poisoned feet. He now walks with two prosthetic iron shoes.

Source: http://hokuto.wikia.com/wiki/P%C4%81n_Gu%C4%81ng-L%C3%ADn