When the house was taken over, it was changed by the developer. How to apply for compensation?

1 This kind of thing is generally tricky; 2. Require the developer to issue relevant test reports and provide written solutions and copies of the reports; 3. The test report is only valid if it is issued by the quality supervision station and other institutions recognized by the * * department; 4. Check the delivery and product changes in the purchase contract to see if there is a corresponding compensation agreement for breach of contract; 5. Confirm whether your contract is filed and whether there is a returned contract or a copy in your hand. Be sure to keep it well and don't return it to the developer; 6. It is possible that the house has been sold too much. It depends on how you negotiate with the developer to discuss the solution. You can ask for check-out, room change, or compensation, but don't overdo it.