I am a salesman of a home improvement company. I want to have a good relationship with the sales department and the property. Excuse me, how to get on well with people in the sales department?

Now properties are generally outsourced to professional property companies. You can pretend that the customer calls the sales department to ask about the house, ask which company is in charge of the property, and then talk to that property company directly. Or when you go to see the model house, directly tell the sales department or the manager how much commission you can get.