The Ten Mile Rhododendron is located about 3 kilometers upstream from the north gate of the scenic area, covering an area of over 3000 acres. Rhododendron is one of the top ten famous flowers in China, with nearly a thousand varieties worldwide. There are three main types of rhododendrons in Dongshan Scenic Area: Rhododendron hirsutum (also known as Rhododendron simsii), Rhododendron simsii, and Rhododendron grandiflorus. Among them, Rhododendron has the widest planting area, with a flowering period from March to April; The flowering period of Rhododendron fortunei is from January to March; It is worth mentioning the Rhododendron grandiflorus, which is extremely precious in nature. It is a primitive and ancient type, endemic to Gaoligong Mountain, and has harsh living conditions and slow growth. The Rhododendron grandiflorus planted in Dongshan is a seedling cultivated by Gaoligong Nature Reserve

In the mountains and forests of nearly ten miles on the Dongshan grassland in Tengchong, hundreds of Rhododendrons are firmly guarded. Every early spring, the first to wake up in Dongshan is the bright red Rhododendron. The weathered brown tree trunk blooms with gorgeous flowers. In "Xu Xiake's Travels," the Rhododendrons in Dongshan Celery Pond are described as brilliant and blood stained. The blooming azaleas reflect the mountain red, "Upon closer inspection, it doesn't seem like it exists in the human world. This thing in the flower is a symbol of Western beauty