High cost performance. According to the national government service platform, social security can be paid in one lump sum for land acquisition 15 years. 15 The land requisition compensation is reasonable. Measures for the collection, management and use of social security fees for landless farmers shall be formulated by provinces, autonomous regions and municipalities directly under the Central Government. After the land-expropriated farmers become regular workers, their length of service is calculated from the date when they are absorbed as workers and report to the unit to receive wages. If only rural land is requisitioned, and the compensation for land expropriation is not reported to the unit or used to pay the old-age insurance for urban workers, the social security length of service for urban workers cannot be paid. Therefore, for those who have not retired, land acquisition is cost-effective.