Up the Yangtze

The construction of China's massive Three Gorges Dam has forced hundreds of thousands of people from their homes — a human up¬heaval almost too gigantic to conceive. Yet filmmaker Yung Chang finds a sad and beautiful way to glimpse the big picture of dislocation through an exquisitely poised small study: He focuses his thoughtful documentary eye on one peasant family whose home is about to be swept away by planned flooding — and whose eldest daughter must abandon dreams of college to work on a cruise ship that offers Western tourists photo ops on the eve of destruction. A