Swallows are seen in a nest on a repaired ancient house in Jieshou Village, Songyang County of east China's Zhejiang Province, May 25, 2018. A program to restore ancient houses has been put into operation since January of 2016 here in Songyang. By far, restoring work has been undergoing in 142 ancient houses and about 120 have finished repair. (Xinhua/Huang Zongzhi)