Historic changes have taken place, effectively promoting the modernization of the harmonious coexistence of man and nature. Adhere to the bottom line thinking, and strengthen the three bottom lines of arable land, ecology, and natural resource conservation and utilization. Cultivated land is the lifeblood of food production. Protecting the red line of cultivated land and building high standard farmland are important manifestations of "storing grain in the land". Since the "13th Five Year Plan" proposed that "adhere to the strictest cultivated land protection system" and "implement the strategy of storing grain in the land and storing grain in technology", the central and local governments have always regarded adhering to the red line of 1.8 billion mu of cultivated land as the lifeline of agriculture, constantly improved laws and regulations, revised and implemented the Land Management Law and the Regulations on the Implementation of the Land Management Law, promulgated and implemented the Black Land Protection Law, and strictly defined the bottom line for the protection of cultivated land and permanent basic farmland. This year's No. 1 central document of the Central Committee clearly proposes to implement "long teeth" hard measures for farmland protection. The Party and the government share the responsibility for farmland protection, and strictly observe the red line of 1.8 billion mu of farmland. Natural resources and ecology are complex and important life support systems in the process of human social and economic development. Economic development cannot be at the cost of ecological destruction. Protecting ecology is to develop productivity. It can be said that the ecological protection red line is another "lifeline" mentioned at the national level after the "1.8 billion mu cultivated land red line". Its fundamental purpose is to ensure the unity of economic, social and ecological benefits by establishing the most strict ecological protection system and setting strict protection space boundaries and management limits for ecological function guarantee, environmental quality safety and natural resource utilization. Over the past decade, all parts of the country have always adhered to the strictest ecological protection system, scientifically defined the ecological protection red line, and ensured ecological security. The quality and stability of the ecosystem have been continuously improved by bringing all the regions with extremely important and sensitive national ecological functions into the ecological protection red line and establishing the national "three zones and four belts" ecological security barrier pattern. The key control areas of desertification land have achieved a historic transformation from "sand into human retreat" to "green into sand retreat". The conservation and utilization of natural resources is the key to improving the efficiency of natural resource allocation, improving the quality of natural resource utilization, ensuring the safety of natural resources, and promoting high-quality economic development. More people and less land is a basic national condition of our country. While adhering to the strictest farmland protection system, we must adhere to the strictest natural resource conservation and utilization system, especially the land conservation system. In the past ten years, all parts of the country have thoroughly implemented the comprehensive conservation strategy. In accordance with the requirements of the "five volume" control objectives of total volume locking, incremental decline, stock optimization, flow efficiency enhancement and quality improvement, the comprehensive evaluation and assessment of the conservation and intensive use of natural resources have been carried out in an all-round way, and the total amount of natural resources management has been implemented. The scale of construction land has been strictly controlled, and the new construction land has been reduced year by year. The level of conservation and intensive utilization of natural resources continued to improve, boosting the overall green transformation of economic and social development. Practice the concept of "two mountains" and create "ecological beauty and common people"