What is the age of building Chen Guang Jia Yuan 17?

Four questions. According to Ankeju's inquiry, Chen Guang's home is located in the east of Wanjia Four Seasons Road, Chenguang Road, Lujiang County, Hefei City. House 7 1, of which 17 belongs to Phase IV. Chenguang Garden Phase IV apartment, located on Baogong Avenue, with convenient transportation and a bus stop nearby, has a property right of 70 years.