What peripheral work does the engineering department have in property management?

Pre-intervention is divided into three stages: pre-intervention means that the property management company starts to intervene in the feasibility study stage of the project; Mid-term intervention refers to starting from the project construction stage; Late intervention is the time when the project is basically over and ready for completion acceptance; In the later stage, routine maintenance and maintenance are carried out for the engineering equipment and facilities that have been taken over;