-- Before writing, put two-thirds of brush hair into clean water, then press it by fingers to remove the glue. Please don't put it in boiling water or hot water -- When writing, make the brush hair carry enough ink -- After writing, clean the brush and ink slab immediately. Otherwise, the ink remained on the brush will impact its lifespan -- Don't cover the brush at once. It should be air dry on the brush rack or other ventilated places. -- Soak the brush hair in warm or cold water if it goes cemented or hard -- Protect chinese brush with mothball in a packaging box if you are going to put it away for a long time. Keep it desiccative in the rainy seasons