In China it's known simply as The River. But the Yangtze " and all the life that surrounds it " is undergoing a transformation wrought by the largest hydroelectric project in history: the Three Gorges Dam. Chinese-Canadian director Yung Chang returns to the stunning, quickly-disappearing landscape of his grandfathers youth to trace the surreal experience of a lavish farewell cruise " packed with well-to-do American and European tourists " as it traverses the gargantuan waterway. Overflowing with wit and deeply perceptive humanism, Chang captures a decisive moment in modern history in what The New York Times called An astonishing documentary of culture clash and the erasure of history. (93 min.) (Also showing at 9:30p.m.)