hi ! Have you ever heard of Jikji, Korea's cultural heritage? I'll let you know if you don't know. First of all, Jikji is the world's first metal type print book 78 years ahead of Gutenberg's 42 planet. It is wrong to say that the 42nd planet was the first metal type printed book. Many people do not know the existence of Jikji even though it is such a great job! I hope you will read this letter and tell the people around you about Korean jikji.