Nine Bamboo Mountain consists of nine peaks, each inhabited by nine cultivation sects. In order, these are: the True Essence Sword Sect of Datuo Peak, Qing Guang Temple of Erxian Peak, Feather Gate of the Three Pure Peaks, Emei Sect of Si Jing Peak, Water Moon Sect of Wuheng Peak, Dingwang Sect of Six Sun Peak, Piaoxiang Sect of Seven Plateaus Peak, Hanyue Sect of Goose Peak and Feixue Sect of Nine Pine Peak.
The ranking of sects is not based on strength. All are fairly mediocre, none standout.
Well, the Three Pure Peaks are seen as the weakest, at least in the eyes of the other eight peaks.
Everyone knows that an old Taoist named Mo Buxiu established the Feather Gate Sect on Three Pure Peaks. However, no one knows about his cultivation strength. Given the scant spiritual energy from Three Pure Peaks, ambitious cultivators wouldn't choose it as a place to establish a sect. Therefore, Mo Buxiu has been classified as someone simply killing time.