Platycladus orientalis: also known as Platycladus orientalis, Cupressaceae, an evergreen tree, it is cold-resistant and drought-tolerant, and its height can reach more than 20 meters. In Beijing, it can make up for the lack of green in winter. Yishan is suitable for water and Yicheng is suitable for courtyard, which has strong adaptability.

Sophora japonica: also known as Sophora japonica, Sophora japonica, Sophora japonica and Sophora japonica. Leguminosae, a big tree, is one of the long-lived tree species with strong vitality. In Beijing, its tree age is as high as over a thousand years.