Pingding sand has five unique properties: “cooking rice does not change color, decocting invariability, stewing meat unchanged flavor, boiled water without scale, planting flowers without rotting roots”. The texture is fine and light, thin, acid-proof, alkali-resistant and breathable. Lead-free, cadmium-free, non-polluting, environmentally friendly and green; the appearance of light flashes bright, simple and elegant, practical and beautiful. For thousands of years, it has been well received by the people.