The human documentary photo book, YEOINSUK 2007-2021, is a record of people living in “Yeoinsuk,” a traditional Korean lodging facility. In the past, Yeoinsuk was a cheap kind of the inns for the poor travellers, but nowadays it is more used as a dwelling place for the lowest class, of which size is about 1 pyeong(1.8m×1.8m) with no cooling or heating systems at all. I first recorded in July 2007 on black-and-white film, and then has visited, researched and taken photos of the old and traditional Yeoinsuks across the country for over 14 years.