Those buildings are tall and skinny, they aren’t hosting 700-1000 people on 35 floors, I’d guess the number is more likely to be around 3 or 4 hundred, serviced by two elevators.
Tall and skinny buildings are creatures created by zoning. We can build wider and taller, but in the US most cities have zoned higher square footage buildings away with setbacks & allowances based on height and depth, forcing developers to build skinny or shrink the width of the building as it rises.
I’m talking China, not the USA. A big slab of a tall building is something that was done in the 60s but is hardly done anymore. Tall and skinny works much better in balancing residential space with a couple of elevators and a staircase.
