What is the construction of three districts in Ningxia?

The "belt" is mainly to implement the national strategy of ecological protection and high-quality development in the Yellow River basin, and to plan and build the Yellow River ecological economic belt; The "Three Zones" are based on three topographic plates, namely, the Yellow River Diversion Irrigation Area in the north of Ningxia, the arid area in the middle and the mountainous area in the south, and are respectively constructed as the northern green development zone, the middle fence protection zone and the southern water conservation zone. The query document "Land Spatial Planning of Ningxia Hui Autonomous Region (202 1-2035)" clearly describes one belt and three districts. Ningxia, located in the northwest hinterland of China, is the largest Hui community in China. The whole region has a small land area, with a population of more than 7.2 million in 2020 and a GDP of less than 400 billion. Although Ningxia has a large population and a small land, it is rich in natural resources. The Yellow River runs through the northern part of Ningxia, forming the Yellow River Plain in Ningxia, which is known as "Jiangnan". Ningxia, with the second cultivated land area per capita in China, is a national commodity grain production base, one of the top ten pastoral areas in China and one of the 14 large coal bases in China.