Why is the property right in Yosemite County for 50 years?

The planned use of land is not completely consistent with the development use. The property right of Yosemite County is 50 years, because the planned use and development use of the land are not completely consistent. Non-residential land is designed and constructed according to residential use function to meet residential demand. However, the house is non-residential in nature and the land use period is 50 years. This kind of property is called commercial residence in the market.