Gua Sha is a movie about the differences between American and Chinese culture. Xu datong is a video games designer in St. Louis. When his father visits from China, he performs Gua Sha (a Chinese traditional treatment) on his grandson, which leaves bright red marks on the skin and causes a lawsuit of child abuse. In the court, Datong loses his mind so that finally he loses custody of his son. I think this scene is shocking and thought-provoking to most of the Chinese audiences. But the most impressing scene to me is the ending. Datong wants to see his son in Christmas eve, he has to climb a pipe to the ninth floor which his son lives. I think the pipe is not only a pipe, but also a gap, a deep gap between American and 5000-year Chinese culture. He wants to climb over the gap and he will never succeed, perhaps no Chinese people really could succeed.