Functionally, the patio is far away from the courtyard. Although patio can play a good role in fire prevention, patio is designed to solve the functional problems of building ventilation, sun protection, rain protection and fire prevention, so patio is better than patio in solving various practical functions of building. Courtyard is related to personality cultivation advocated by Confucianism. The ancients materialized "heaven" into nature and put the worship of mountains and rivers in a very high position. A gentleman can't always be in the wild, so the courtyard has been a place where people get close to nature and cultivate their morality since ancient times. In this respect, the function of closed patios is obviously not as good as that of quadrangles.