Li Changkan, the director of the Museum of Natural History under Zhengzhou Normal University, said that these swallows are Riparia riparia, a kind of migratory bird that fly to southern China in autumn and winter, and that shortly stay in northern China. They breed in May, and the baby swallows can fly and live by themselves in July. The authorities in charge of the construction site said that they have suspended the project to protect the birds, which is praised by many netizens, who now call the site "a construction site full of love". [Photo/Chinanews.com]