Introduction to Duzupan Beitianmen: Duzupan is the trail leading to Houshiwu, which was called Daiyin Ring Road in ancient times. Going down the slope from Zhangren Peak to the north, there is a stone square with the original name "Yuanwu" on the mountain col. It was abolished at the end of the Qing Dynasty and reestablished in 1984 with the title "Beitianmen". To the north of the square is Moyun Ridge, with Danzhang soaring in the sky. To the north is Mingyue Peak, with its beautiful peaks forming a barrier. Zhang Jingyan, a native of the Song Dynasty, once lived here in seclusion. Because he grew purple zhi, it was commonly known as Caizhi Temple. There is a rouge stone next to it, the color is like painted red. To the north is Lanzhang Stone House, which is said to have been the alchemy place of Zhang Sanfeng in the Ming Dynasty.