Most of the hutongs in Beijing run straight from east to west, south to north, and vertically and horizontally, forming a very square city of Beijing. This also shows that the ancient city of Beijing has been carefully planned. , built according to a chessboard-shaped blueprint. And because the residences are arranged in courtyards facing north and south, they are aligned to form alleys, so there are more east-west alleys and fewer north-south alleys. This kind of planning draws on the construction experience of imperial capitals in past dynasties and reflects the traditional characteristics of cities built in past dynasties in our country.