Introduction to the site: The Admiral's Office has three courtyards along the central axis, which are divided into three halls: front, middle and back. The front is the meeting hall, the middle is the banquet hall, and the sacrificial hall is at the back. There is a long corridor connecting the east and west courtyards. The left and right turrets in front of the gate are the chanting, music and lookout points, and the east and west sides are the gates.