Is the Korean drill pot the so-called nano-diamond infiltration layer? I'm also studying it. I haven't used it, but I'm developing a non-stick pan. At present, the non-stick pan coated with fluorocarbon is basically non-toxic, and the ceramic is better, but the long-term non-stick of ceramic is poor. We are also developing a diamond coating. Whether it really has five times the hardness of other pots depends on your use. Our high-end products also have high hardness and wear resistance, and the hardness of ceramics is higher.