Tolong jelaskan mengenai 20,000. dari Babagian administratif Koréa Kidul dalam bahasa sunda

A "myeon" is one of the divisions – along with "eup" – of a county ("gun") and some cities ("si") of fewer than 500,000 population. "myeon"s have smaller populations than "eup"s and represent the rural areas of a county or city. Myeons are subdivided into villages ("ri"). The minimum population limit is 6,000.