Someone will knock at the door in the neighborhood. Is it a property?

No, there will be someone knocking at the door in the community, not the property. If someone knocks at the door, it's the property. Never open the door. That is, criminals call the property service office to confirm the identity of visitors. "Encyclopedia of China Property Management Service Industry" welcomes industry elites with enthusiasm for participation and historical responsibility to join hands in thinking space and create a platform for China property managers to enjoy their own experience, knowledge, thoughts and beliefs.