A 12-movie series at REDCAT reveals the daring independent streak shown by a new generation of filmmakers working with scant resources outside government purview. Ever since the 1920s, Chinese film history has been grouped into large, monolithic blocks, as imposing as the Great Wall. There's the First Generation of silent-movie pioneers, the Fifth Generation of "post-Maoist humanists," the Sixth Generation that sprang from the cultural wreckage of Tiananmen Square, and so on — coinages used both in and outside China.