For those dispatched to Korea as portion of agreements with overseas companies, this type of visa would apply. https://www.drbrianhoward.com/%EB%AF%B8%EC%8B%9C%EC%95%8C%EB%B0%94-%EC%97%AC%EC%84%B1-%EC%9C%84%ED%95%9C-%EA%B5%AC%EC%9D%B8%EA%B5%AC%EC%A7%81%EC%9D%98-%EC%83%88%EB%A1%9C%EC%9A%B4-%ED%8C%A8%EB%9F%AC%EB%8B%A4%EC%9E%84/