I mean to contrast with the Vancouver experience - lots of empty units, or units empty for many months of the year. When they go to Vancouver to visit, it's just for fun. They don't need to work, and don't work. You might meet them in public spaces and make friends with them, and find it surprising that they have so much money without needing to work.
I live in San Francisco. No one I know has any belief about any units being unoccupied. All the Chinese people I meet here are working.
It is unlike the anecdotes I hear from friends living in Vancouver.