Bird's Nest is one of the main producing areas of high-grade "Yanzheng Tea" in Wuyi Rock Tea, which is called "Yan Rou" for short. The price is about 1, 000-2000 yuan. Due to the unique origin and ecological environment, swallows and cinnamon tea trees grow among rocks, forming a special ecological environment of rock tea. This kind of tea has excellent quality, strong cinnamon aroma and unique taste, and is considered as high-grade tea.