In the Hangzhou Yong Jinmen Square, five blue-collar workers with safety helmet were showing several poses, such as go-car, bricklaying and survey on 7.19. They kept these poses in 15minutes, which attracted many passerby.It is said that these so-call blue-collar workers are undergraduates of Zhejiang University of Technology. They attend a social practice group with the name “hand in hand”. The wore work dress and smeared mud to hands and faces, acting as blue-collar workers on the construction field. They hope that they can call for care of blue-collar workers though their action art.