Based on the production of the original three-layer magnesium oxide board, an additional layer of high weather-resistance decorative granular material is added to the surface. This process is still achieved through a natural chemical reaction that integrates the decorative particles fully with the MgO, forming a single cohesive unit. The entire structure of the board remains integral while offering exceptional decorative effects. It replaces the need for surface painting materials such as real stone paint, marble, tiles, and other exterior wall decorations. More importantly, it significantly reduces the time required for manual operations. Once an exterior wall is installed, there's no need for additional painting or dry-hanging of decorative materials.