It is recorded that there was a pottery shop called 'Osa Yori' in the Sangju Woodblock of King Sejong Silokji during the Joseon Dynasty. Jeong Hak-bong's Ong Enterprise is now in its fourth generation, a family business that began during his high years. From the time of Gojobu to the time of his grandfather, he worked at the Onggi Factory in Sangju and Boeun, and settled in his current position when he was a famous Ong Enterprise.

Various earthenware made using traditional methods of production will come out of the world through Yeonsilyo, a traditional six-room jangja exposed to the ground. The production works are centered on the names of living containers that can be easily used in everyday life, such as the complex, various pots, kunju, jabaegi, various semi-phase machines, and ttukbaegi. Onggi's production methods, processes, types of products, and formability are meaningful in that they not only faithfully inherit the basics of traditional onggi production, but also continue the traditional onggi production in the Sangju area.