As one of the most basic means of agriculture, cultivated land (CL) provides the basis for human survival, reproduction, and development. However, the rapid growth of the world’s population has put tremendous pressure on the limited CL resources (Yang et al., 2000; Deng et al., 2005; Jin et al., 2017). In recent years, the CL resources in China have faced the problems of low quantity, low quality, low utilization efficiency, and insufficient reserve resources (Deng et al., 2015; Jin et al., 2013). In the 20th century, Brown (1995) asked who will feed China, believing that China’s food shortage would lead to an overall increase in world food prices, which would bring about a global crisis. However, in the 21st century China has paid much attention to planting high-yield varieties and constantly improving its agricultural infrastructure and technology. With less than 10% of the world’s CL, China has succeeded in feeding more than 20% of the world’s total population, effectively protecting China’s food security (Lyle et al., 2015; Huang et al., 2004; Chen et al., 2011). In addition, China has formulated relevant policies for the strict control of the land minimum concerning CL and intensive utilization of land resources, and measures for the remediation of farmland and land reclamation have been proposed (Liu et al., 2017; Jin et al., 2019).