Students majoring in flight attendance in a college in Chengdu, southwest China's Sichuan province receive hard etiquette training on Jan. 26. With a bottle on head and a piece of paper between the knees, they were asked to stand firmly for three minutes. Watching the photos, a netizen commented: "It's not easy to be a flight attendant who has to master the skills of an acrobat." (CNS/Yun Fei)