The maximum lease term is 20 years, and the part exceeding 20 years is invalid. According to Article 21 of the Rural Land Contract Law (20 18), the contracted period of cultivated land is 30 years. Grassland contract period is 30 to 50 years. The forest land contract period is 30 to 70 years. "It is stipulated that the time for farmland adjustment may be once every 30 years.