Where can I check the transaction data of second-hand houses in Nanjing?

Consult Nanjing Housing Authority. The Housing Authority will announce the details of local second-hand housing transactions, including transaction quantity, transaction area and transaction amount. Housing Authority is the real transaction data after the real estate has been put on record. These data can be queried online in official website, the Housing Authority, or in the lobby window of the Housing Authority with information such as contracts and ID cards.