the city administered the county system, and Pingding County and Yu County were assigned to Yangquan City. Yangquan City became a city with three districts (city, mine and suburb) under the jurisdiction of two counties (Pingding and Yu County) directly under the jurisdiction of Shanxi Province. Natural resources Water The total amount of water resources in Yangquan City is 1.584 billion cubic meters per year. Among them, the river runoff is 1.382 billion cubic meters per year (including 490 million cubic meters per year in this river and 892 million cubic meters per year in the outer area). The amount of groundwater resources is 543 million cubic meters per year (including 435 million cubic meters per year for local groundwater resources and 108 million cubic meters per year for incoming groundwater resources in the outer area), The repeated amount of river runoff and groundwater is 341 million cubic meters per year. The per capita share of local water resources in Yangquan City is only 562 cubic meters per year, which is slightly higher than that of Shanxi Province, which is 546 cubic meters per year, less than 1 to 4 of the national per capita water resources of 2400 cubic meters per year. It is only 1 to 8% of the world's per capita water resources. Plant Yangquan City has complex habitats and a wide variety of plants. According to the Engler-Gilger classification system, there are 93 families and 437 species of common plants in China, including 5 families and 5 species of fungi and 4 families and 6 species of ferns. There are 4 families and 11 species of gymnosperms, 80 families and 415 species of angiosperms (including 72 families and 360 species of dicotyledons and 8 families and 55 species of monocotyledons). Among the families, the most species are Compositae, Leguminosae, Rosaceae and Gramineae, followed by Liliaceae, Umbelina, Labiatae, Chenopodiaceae, Ranunculaceae, Solanaceae and so on. Among the plant variety resources, there are more than 160 species of medicinal plants, as well as a variety of food crops, oil crops and vegetable crops. Yangquan City has 941000 mu of forest, accounting for 13.74% of the total area of Yangquan City, with another 22.05 million trees on the four sides, with a total wood volume of 550000 cubic meters. In the forestland, the economic forest is 48000 mu. There are 1.821 million mu of pastoral slope grassland, of which more