If you have already applied for the real estate license, you only need to go to official website, the local real estate administration, and enter the name of the property owner and the title certificate number. If you haven't applied for a real estate license, you can check the house sales contract on the website of the Housing Authority and enter the contract number and password (the password can be consulted with the developer). Generally speaking, what you found at this time is the contract record number, and there is no problem with the contract after filing, so the possibility of real estate license fraud is relatively small.
If you want to find the accurate information of real estate license, you need to bring your ID card and real estate license to the archives or window of the local real estate administration.