What is "jamsil-dong"

Jamsil-dong is a neighbourhood, dong, of Songpa-gu, Seoul, South Korea. Its name is derived from silkworm breeding during the Joseon dynasty. Jamsil translates to a room or place for sericulture. The state encouraged people to raise silkworms, so founded Dongjamsil (동잠실, literally "east place for sericulture") in the east vicinity of Seoul.