What are the authentic quadrangles in Beijing?

Liu Hai Hutong Courtyard, Liu Hai Hutong is located near the central axis of Beijing, covering an area of 1 740 square meters, with a construction area of 729 square meters. A * * is a yard with three entrances. The courtyard is Baylor House in Qing Dynasty, which retains the original pattern of quadrangles. The shape and grade of the gate is Liangguang Gate, which is a palace gate second only to Wang Fu Gate. There is a pair of drum doorways at the door. As a rule, officials must be second-class or above to qualify. Enter the gate, face the screen wall, turn the screen wall to the first yard of the west courtyard, pass through the green passage made of grape trellis, and reach the hanging flower gate of the second yard. There is a tall walnut tree on the left side of the passage, under which is the cellar entrance. On the right side of the passage is a row of Chinese roses and several clumps of peony. There are two pomegranate trees near the corner of the yard. Entering the Diaohuamen is the second entrance of the courtyard, with the main hall and master bedroom in the north, and the verandahs on the other three sides are being rebuilt. There is a cross aisle in the middle of the yard, which divides the yard into small flower beds. There are two persimmon trees in the two flower beds below the main room, and the other two flower beds are full of Chinese rose flowers. There is a door in the main room leading to the third yard.