'When his wrinkled hand touched the crude metal, a beautiful butterfly bloomed sadly. A place where the public eye cannot reach. As the National Intangible Cultural Heritage No. 64, he is making feldspar with his son in a small workshop measuring about 3 pyeong. The noise of the workshop, which had been busy with many weavers, was now filled with the intermittent sound of hammering and file files of the rich man. '