translation.en: So they'll put 20 or 40 up at a time, and they just go up in the same way as a single-family dwelling would go up here in an area. And the density is quite incredible.
translation.zh: 这里，建筑业也以同样的速度发展着 二三十栋楼房 同时拔地而起 等待一户户人家蜂拥而至 照片中大家可以看到这里的居住密度