【《时光列车》：中国地铁的速度与温度】北京纵横交错的地铁穿过城市的历史与日常，也连接着无数普通人不普通的故事。《时光列车》展映正在第16届北京国际电影节，讲述平凡人生的不凡故事，等你上车。Have you ever really learned about Beijing subways? How much greatness is hidden in people's daily ride? Follow CGTN reporter Wang Yangyang to watch the documentary The Time Traveler at the 16th Beijing International Film Festival and uncover the stories behind Beijing's subway lines. http://t.cn/AXxYr0iv