Hello, 1, online inquiry: Click on the provincial and municipal links to enter the websites of local real estate administrations for inquiry-> You need to enter the name of the property owner and the title certificate number (at present, only some areas provide housing property information inquiry). 2. Inquiry of the Real Estate Bureau: If you want to inquire about the accurate information of the personal real estate license (including the owner's name, title certificate number, registration approval date, construction area, design purpose of the house, source of rights, whether the house is mortgaged, etc.). ), you must bring your personal identification and real estate license to the archives or window of the local housing authority (real estate trading center, housing authority, housing authority) for inquiry.