1Advantage: Energy conservation, environmental protection, economical, heat insulation, good structure, easy-doing construction 2Feature: Good-quality color steel, filled with high-density PU 3Application field: Wall Panel shows better expression on designation, quality and strength than traditional ones. Both the problem of heat transfer of internal and external metal and that of screw are worked out well. Meanwhile, the position change of each panel doesn't affect any other panel. And the easy-install and reasonable price catch more consumers.