Tiāntángzhài (Chinese: 天堂寨) is the second highest peak of the Dabie Mountains located on the border between Hubei and Anhui provinces in the People's Republic of China. Straddling Hubei's Luotian County and Huanggang City along with Jinzhai County in Anhui, the mountain rises to a height of 1,729.13 metres (5,673.0 ft) above sea level. It forms the watershed between the Huai and Yangtze Rivers and is also known as the "Number one pass in the southeastern Yangtze River region" (吴楚东南第一关).
During the Tang and Song dynasties Tiantangzhai was known as "Yun Shan" (云山, Cloud Mountain). In the Yuan and Ming dynasties it became "Duoyun Shan" (多云山, Mountain of Many Clouds). The present name dates from the Qing dynasty.[1]