Sentries there signaled to other troops for an approaching enemy by waving a flag or firing a gun. Its arched structure (hong-ye) was built-in August 6, 1796 (the twentieth 12 months of King Jeongjo?�s reign). A posa is actually a sentry publish from which, in scenarios of emergencies for example https://jeju-weather45443.blogkoo.com/not-known-facts-about-suwon-hwaseong-수원룸살롱-50892512