Thereafter, as architectural technology improved, tightly packed high-rise buildings appeared, and people from different places, sharing only similar earning power, lived together under a single roof, coming and going each day through the same main doors.
其後隨著建築技術的演進，集合式高樓住宅興起，來自各地的工薪階級同住一個屋頂下，每天從同一扇大門進進出出卻從不往來。