Amazing photos of high-density housing in Hong Kong
This is public housing, not the high end condos you see climbing Victoria Peak, and it is seriously dense and close together: "the expansive altitudes of residences and domestic spaces are saturated in rich structural detail and humanistic signs of the everyday occupant living there."
Almost every unit has a minisplit air conditioner; these are standard equipment now. I wonder how loud it gets in what appear to be little more than air shafts. Lots more photos at Designboom.