“The Warriors of Qiugang” was co-produced by Yale Environment 360 with filmmakers Ruby Yang and Thomas Lennon, who have made a trilogy of short films set in China — the first of which, “The Blood of Yingzhou District,” won the 2006 Academy Award for Best Documentary Short. In addition to the Oscar, Yang, who lives and works in Beijing, has won numerous international awards for her documentary and dramatic films. Lennon’s work in documentary film has won the field’s most coveted honors: three Academy Award nominations, two duPont-Columbia awards, two George Foster Peabody and Writer’s Guild Awards, and two national Emmys.