The 3 Heavenly Gates (三天门)
When walking up the old pilgrimage path at Mt. Wudang to the golden summit (Jin Ding, 金顶), which corresponds to the Bai Hui point (百会) in the human body, there are two main ways for the pilgrim to ascend: one is the Yin path (Ren Mai, 任脉), and the other is the Yang path (Du Mai, 督脉). Each station along these paths corresponds to energy points in the human body.