origin : https://en.wikipedia.org/wiki/Gang_Se-hwang
Gang Sehwang (1713–1791) was not only a high government official but also a representative painter, calligrapher and art critic of the mid Joseon period. He was born in Jinju, Gyeongsangnam-do, the son of Kang Hyeon. He entered royal service at over sixty years old. Gang pursued and established muninhwa ("paintings by people of culture", referring to the Korean seonbi or literati upper-class) with his own creativity.