Jia Zhangke’s odyssey through 21st-century China is mostly footage shot during the production of other films. The result is staggering. Photo: Sideshow/Janus Films The man tells the woman he’s leaving. The woman runs out in tears. Though neither speaks a word, we read his message to her in a title card: “I want to leave and have a try outside. Once I get settled I’ll come to fetch you.” A train pulls out of the station, heading south with him on it. The woman stays alone in their dusty and arid