There are two extensions and one addition. The first expansion was presided over by Qiao Zhiyong during the Tongzhi period of the Qing Dynasty, and the second expansion was in the middle and late Guangxu period, with Qiao Jingyi and Joe in charge. The last revision was completed by Joe and Qiao Yingkui ten years after the Republic of China. It took nearly two centuries from the construction to the final completion of the current pattern. Although the time span is very long, the subsequent expansion and addition can be carried out according to the original idea, so that the whole courtyard style is consistent and integrated.