In Hong Kong because of space shortage the buildings are so narrow and high that many restaurants are not on the ground floor, but high up in the building.

— Emanuel Derman (@EmanuelDerman) December 7, 2018

Can confirm. When I was in Hong Kong, the “budget” restaurant was on the 15th floor and the fancy one on the 27th. I ate at the fancy one because I’d never eaten at a posh non-American restaurant before that time (but plenty of budget ones).