In late autumn, Longchuan in Dehong is still full of vitality. In the streets and alleys, clusters of bougainvillea are full of branches, which are so beautiful that they make people intoxicated. Bougainvillea has three petals, with various and bright colors, delicate pink, elegant purple, and pure white. Under the sunshine, it is colorful. Whenever the breeze blows, the petals sway in the wind, which is a unique autumn romance.