The map recorded China’s 2,819 critical petroleum projects, which tell where crude oil comes from, how they are transported, where they are stored and processed, and where the oil products head for. The recorded projects are consist of oilfields; gasfields with commercialized condense; oil shale; oil sands; oilfield pipeline networks; long-distance crude oil pipeline; strategic oil bases and commercial oil reserve storages; oil ports, terminals and offshore SPMs; refinery and petrochemical bases; oil products supply systems.