More than 600 years ago, the Korean court began to use handmade copper tableware. It is a masterpiece forged by hand by copper and tin according to the golden ratio of 78:22, and it is also a national treasure cultural heritage of South Korea. "Corporal Lixian" refers to politeness and profound manners. Polite and kind? ? Every product of utensils has been tempered and forged by hand for thousands of times, which contains the wisdom and allusions of craftsmen. Copper is a trace element needed by human body, which can be absorbed in a proper amount by using copper tableware. However, copper tableware will oxidize with air after it is wetted, resulting in copper rust that is harmful to the body. Therefore, when using copper tableware, the stains on the copper surface should be scrubbed in time to keep it clean.