/kloc-The land expropriation in the 1970s was free expropriation by the people's commune. According to historical records, it is known that the land was expropriated by the people's commune for free in the 1970s. Expropriation of land is an act that the state turns the land collectively owned by farmers into state-owned land in accordance with legal procedures for the needs of social public interests, and gives certain compensation to the units and individuals whose land has been expropriated according to law.