Chlore is a member of the genus Apocynaceae, an evergreen woody vine with a stem length of up to 50 meters. With milk, twigs are pilose, and branches and knots are long enough to climb the tree or sing on the wall. Leaves opposite, shortly palmate, elliptic or ovate-lanceolate. Cymes axillary and terminal, calyx 5 deeply reflexed, corolla white, salverform. Flowering from April to July, fruit matured in October. The network originates from China, Shandong, Shanxi, Henan and Jiangsu. As a woody vine with a wide distribution, it has many advantages: Adaptable. The adaptability of the rock is extremely strong and the soil is not strict. It is hi light, slightly tolerant to yin, drought, strong flooding resistance, strong cold resistance, and is able to grow robustly in the Taihang mountain area of ​​Jiyuan City, Henan Province, where the temperature is as low as -23°C. 2. Strong anti-pollution ability. The complexes grow fast, the leaves are long and leathery, and the surface has a waxy layer. They have strong resistance to harmful gases such as sulphur dioxide, oxygen, and hydrogen chloride, fluoride, and automobile exhausts and other photochemical smog. It has a good ability to absorb dust and can purify the air. 3. Easy to cultivate, extensive management. Stones generally use cutting propagation, cuttings can easily survive. Because of the characteristics of its stem stem rooting, it can be used to cut a large number of plants at one time by cutting the ramets after rooting at the stem nodes. It has a strong root system and strong absorption. It can grow normally in calcareous soils, acidic and neutral soils. It sprouts strong, resistant to pruning, when used as a ground cover plant, can be trimmed to be as smooth as a lawn. It has strong resistance. The author tried to plant it for several years and has not found pests and diseases. Coral stone is evergreen, flowery and clean, such as snow, fragrance attack. Can be planted in the garden, parks, walls, pillars, pavilions, corridors, steep walls and other decorative embellishment, very beautiful. Because its stem is easy to root after touchdown and it has good resistance to negativity, it is also an ideal ground cover plant. It can be used as a ground cover and a marginal ground cover for open forests. At the same time, the stone is thick and leathery, with strong drought tolerance, heat and flood resistance, cold resistance, and a wide range of adaptation. It can be used as a greening plant in the severely polluted areas, and the greening of roads and slopes with poor environmental conditions is preferred. As the stone is resistant to pruning, evergreen is always available, and it can also be used together with the gold leaf privet and red leaf hibiscus for greening with color blocks.