Refers to a corridor connecting two or more independent buildings. There are four types of verandahs in Beijing courtyard houses: the Chaoshou veranda that turns on the east and west sides of the central gate leading to the east and west wing rooms; the Wojiao verandah that turns north from the east and west wing rooms and leads to the main house; there are eaves verandas in front of the east and west wing rooms and the main house, and The Chaoshou corridor and the Wojiao corridor are connected to form the word "合"; there is also a corridor that is deep or horizontal and is used to connect two or more courtyards.