Chang 'an District belongs to Xi City, Shaanxi Province. Located at east longitude108 38 ′ ~10914 ′ north latitude 33 47 ′ in the hinterland of Guanzhong Plain, bordering Qinling Mountains in the south and surrounding Xi 'an city in the west to the south, it has a warm temperate and semi-humid continental monsoon climate. Total area 1580 km2, 25 sub-district offices under its jurisdiction, permanent population 1009700 (20 17) and registered population of 922600.

Brief introduction of Chang 'an District

Plant resources Chang 'an is rich in plant resources. The main tree species are Pinus tabulaeformis, Pinus armandii, Cedar, Tilia amurensis, Betula platyphylla and Paulownia. Grain crops are mainly wheat, corn and rice, as well as millet, beans and potatoes. The cash crops are mainly cotton, rape, vegetables, melons and fruits, flowers, and a small amount of tobacco and marijuana. There are more than 70 kinds of vegetables.

Many of them are historical and traditional dishes, such as lotus root in Dongda University, five-star Chinese cabbage, leek in Qu Wei, leek in Huang Liang, lettuce in Dayu and so on. The main fruits are apples, pears, peaches, grapes, plums and persimmons. Mountain products specialties mainly include chestnut, walnut, pepper, lacquer wood, black fungus, rosin, cinnamon and so on. Plant medicinal materials 65 1 species, with total reserves exceeding 1 10,000 tons.

Eucommia ulmoides Oliv National key medicinal materials, with animal resources 199 species. Judging from the geographical distribution of animals, Chang 'an is in the transition zone from the southern margin of Palaearctic realm to Oriental realm, and the animal populations of the two flora are both. Palaearctic animals mostly live in mountains above 2200 meters above sea level, while oriental animals mostly live in middle and low mountains.