2, the natural characteristics and functional requirements of resources, farmland protection, returning farmland to forests and grasslands, fallow, crop rotation and pollution prevention; Grassland grazing prohibition, grazing prohibition and rotational grazing. Nature, a Chinese word, is spelled dàzìrán, and (nature) means nature in a narrow sense. It is a material world different from human society. That is, the inorganic world and organic world of natural science research.