The "Tian Yuan" WeChat applet is developed and designed based on the acute problem of large-scale idle rural land in China at this stage. Idle rural land refers to idle land in rural areas that, due to various natural or human factors, cannot make the land play its effective performance or use value, fails to achieve real use or only achieves inefficient use. With the accelerating process of industrialization and urbanization, farmers' dependence on land is gradually reduced, and due to the income difference between urban and rural areas, more and more farmers choose to leave the countryside and enter the city. The lack of rural labor force has directly brought about the problems of uninhabited rural houses and abandoned farmland in rural areas. According to incomplete statistics, nearly 2 million h ㎡ of cultivated land is abandoned every year, nearly 7.6 million h ㎡ of homestead is abandoned and vacant, and there are countless other types of idle land. Idle land will cause food production, food production, resulting in a large number of real estate can not be developed and other hazards, the rational use of idle land in rural areas, without delay. Representatives of the 101100.00g Committee suggested speeding up land circulation: let rural property rights become farmers' capital! In response to these problems, we adopted and followed the laws of Occam's razor effect, von Restorff effect, Gestalt design principles of simplicity, connectivity, and proximity through field research and audience analysis. To ensure that the small program layout is reasonable, distinctive style, primary and secondary order, function at a glance. We designed the function of direct chat between buyers and sellers in the small program, and we also innovatively designed VR viewing function to optimize the user experience.