A single project refers to a complete set of projects with independent design documents, which can independently exert the benefits of capacity investment after completion. It can be understood that a building is a single project, and a unit project is a part of a single project, which can be divided into construction projects and equipment installation projects. I study in Hangzhou Gaobo Education and Training College. These are all basic knowledge, and their family is also specialized in this business. Absolutely no problem.