Introduction to Tiangai Temple: Tiangai Temple is located on the top of Mengding Mountain. It was founded in the Han Dynasty and rebuilt in the Song Dynasty. The temple covers an area of ​​8,000 square meters, facing the mountains in the distance, and is surrounded by 12 thousand-year-old ginkgo trees. The Ming Dynasty stone pillar hall in the middle is where Wu Lizhen, the founder of Mongolian tea, grew tea. There are pictures, texts and objects on the history of tea, in front of the temple and behind the temple, and in the forest of steles in the ancient square.