This is the 2957th most frequent Korean word.
청사에서
"청사에서" means "at the government building" or "in the office building."
Here, '청사에서' indicates the locational setting for the event.
청사에서 행사가 열렸습니다.
An event was held at the government office.
In this case, '청사에서' specifies a workplace.
그는 청사에서 근무합니다.
He works at the government office.
Here, '청사에서' describes the place where the activities were conducted.