1. Go to the website of Housing Authority and find the online transaction information inquiry page related to commercial housing sales.
2. Enter the property information to be queried, such as property name, property ownership certificate number, contract number, etc.
3. Click the query button, and the system will display the relevant information of the property, including the name of the developer, the address of the property, the building area, sales, etc.
4. If you want to inquire about the transaction amount of the property, you can look for options such as "transaction price" or "transaction record" in the query results, and usually the latest transaction record and price will be displayed.
Please note that different housing authority websites may have different query methods and display information, so the specific operation may be slightly different. If you can't find the online transaction information of commercial housing sales on the website of the Housing Authority, you can try to contact the local real estate agent or relevant departments for consultation.