Switching on the portable lights, everyone helped Bing Shi to uncover the material. There were precast foundation walls, beams consoles, flooring, and roofing. Stacked on each other, they were neatly placed in an orderly manner.
Under two covers were long shipping containers, opening one of them, there was classic equipment which could be found in any other construction site, like shovels for digging, bolts thick as an adult's wrist to connect all the precast parts, steel and plastic pipes, mud boots, gloves, headlights for soldiers, and three portable toilets.
While the soldiers were changing their equipment, Bing Shi pointed at the ground, "Did you see the needles with colored heads? Connect their heads with a string and dig along the way. A yellow is half a meter deep. Green is one and a half meters. Red is three meters. Red is for the main base and pipes. Blue is for roads. Purple is for fences."
