Binzhou Green Stone, due to their infinite variability in properties such as water absorption, density, and hardness, appears hard and durable. In reality, the pores of the stone are like human skin. They breathe in air, dust, and microorganisms, and can also be corroded and weathered. With the development of modern industry and the increasingly恶化 global environment, the corrosion and pollution of the stone are exacerbated, leading to stubborn problems like water stains that won't dry, efflorescence (i.e., alkali bloom), yellowing, and rust spots, which accelerate the deterioration of the stone.