Lol china is not losing anything, just a single thing - money
The rich from china moved to the west, the stuff that they buy will all stimulate a cash flow. Buying a house will involve someone selling their house for money, money that they will use to buy another house and/or car or anything. Then the rich Chinese will need to hire someone to fix the house and pay taxes and stamp duty, which the government will then use for something else.
Whatever they buy in the west will in itself generate their own cash flow sequent and this is what Chinese government is losing, their own economy. Not to mention buying properties I self is a form of investment so the more rich people left china, they will lose more money that way
Getting foreign money to buy houses and using that money to consume stuff made overseas...why does this sound so familiar? Oh that's right, it's called a housing bubble, like the one from 2008.
You do know that China is currently having a lot of problems with too much dead money not invested productively but used to speculate and bid up assets from houses to wine.
They're getting money faster than they can find good uses for them, and all those money ends up either fueling bubbles, or sitting unused in China's ridiculously large reserve.
Eventually that money has to be spent on investing into REAL production in order for a country to truly benefit.
I am not seeing any wealthy Chinese dismantling their businesses in China and transferring them here to Canada. I do see them paying 3x what normal people pay for houses and locals complaining that housing is getting ridiculously unaffordable to them.