/kloc-who is the "head portrait" on 0/0000 won?

That man is King Sejong, the founder of Korean. One of King Sejong's most famous achievements is to convene famous scholars such as Zheng Linzhi, Cheng Sanwen, Shen, Pu Pengnian, Cui Heng, Lao and others to create Korean. The Korean alphabet consists of 1 1 vowels and 28 consonants. Simple and accurate, uneducated people can learn it in a few hours. Confucian scholars are greatly opposed, saying that the use of Han Xin will hinder the study of Confucianism. Sejong insists on promoting Korean. And in A.D. 1446, the book "Correcting People's Voice" was published. The official written language is still Chinese, just like Latin in Europe, but the lower classes in North Korea have the means to write their own language. They wrote Ode to Dragonflies in two languages, which was founded by the Acura Dynasty, and translated the book Detailed Music (a fragment of the Buddha's life) into Korean. These two books laid the foundation for the practical application of Korean.