只不过，一线城市曾经逼仄的车厢，如今似乎宽敞了些；而在杭州、武汉、合肥，越来越多人涌入早班地铁，前胸贴后背成了常态。这些体感变化，映照的正是中国人口版图的重新洗牌。

Chai Jing is the impassioned journalist known for her viral self-funded documentary on air pollution, "Under the Dome" (Qióngdǐng zhīxià 穹顶之下). Co-released online in February 2015 by ...