Qi Yuanji models the XPS heat preservation board is uses the vacuum to become spongy, the series connected screw rod squeezes out a formation product. Pushes models the board, regardless of from the intensity or from the heat preservation effect and the anti-water vapor seepage and so on various aspects, greatly surpasses gathers ordinary the benzene board. Therefore said that Qi Yuanji models the board is gathers tradition thermal insulation material and so on benzene board best substitute commodities.