When I went to 798 Factory in a winter, I found a sparrow with wounded wings in a roof, trying to fly but failed and fell in the snow, I saved it and took home. On the way home I saw the injured sparrow suffered strongly, which is just the same as today's human beings! For thousands of years, countless pioneers sacrificed for the realization of human liberty ?equality and happiness. In today’s highly advanced material civilization it seems human beings can achieve everything. Are we really happy, really free? I took on wings angel, a symbol of original beautiful, kind-hearted and pure. This injured angel fell in all of human dwelling place: the ruins of dilapidated, deserted forests, oppressive city and the construction of formidable power……Works depict the helplessness, hurt, despair, hope, dangerous situation of individual in this contemporary process of urbanization.