What should I do if I write a property fee of 0.65 on the house purchase contract and then raise the price?

1. Check the house purchase contract carefully: refer to the terms of the house purchase contract, confirm the specific terms of the property fee and the price increase terms, and find out whether there is an agreed adjustment mechanism.

2. Communicate with the developer or property management: contact the developer or property management to inquire about the reasons and basis behind the price increase.