Introduction to the Rhododendron Sea: Guibei Ridge in Guifeng Mountain is the place where Rhododendronsimsii has the most concentrated distribution, the purest forest structure, the largest population area, the oldest tree age, the best preservation, the most beautiful plant shape, and the most magnificent landscape in Macheng, Hubei. The natural community is rated as the best in the world by Guinness. Every year in April of the lunar calendar, the ancient rhododendrons all over the mountains and plains on Guibei Ridge are as red as fire, like colorful clouds lingering around the forest.