Log on to the website of Guangzhou Housing Authority, and enter the name of the property owner and the title certificate number to inquire. 1. Online inquiry: Generally, we can go to the website of the real estate management bureau of the city where the house is located to inquire about the real estate license. Generally, we need to enter the name of the property owner and the number of the property right certificate (at present, only some areas provide housing property information inquiry, not all cities can). 2. Inquiry by the Real Estate Bureau: If you want to inquire the accurate information of personal real estate license (including: the name of the owner, the title certificate number, the date of registration and approval, the building area, the design purpose of the house, the source of rights, whether the house is mortgaged, whether it is sealed up, etc.), you must cooperate with the property owner. Generally, you can bring your personal identity certificate and real estate license to the local Housing Authority (real estate trading center, housing authority, housing management office, etc., and the names vary from place to place) archives or inquiry window for real estate license inquiry.