Well, as we're talking about comprehension, this is what I wrote in my previous post. Would you like to engage with any of it?
"The data about millionaires leaving is not reliable high-quality research - it's produced by asset management groups that are explicitly biased, in that they are employed to represent the interests of the wealthy. The proportion of millionaires leaving is actually small, because there are a lot of them to start with. Analysis of why they are leaving suggests it has a lot to do with Brexit and the failure of the UK to invest in the tech sector. Then there's also the weather - quite a lot of pensioners are now millionaires and leave to retire in the sunshine. Lol at the idea of France as a low tax haven though..."
Having said all that, and to answer your question, those asset management companies you all love to cite actually seem to be claiming that China lost more millionaires than the UK. Not hugely surprising given population sizes.
And this reflects that these figures aren't particularly useful. Indeed, the fact that we score highly on this metric primarily reflects that we have lots of millionaires in the UK - about 2.8 million of them, fourth in the world. Thus, when we lose a few of them, the figures look high. But the loss last year only amounts to around 0.3% of what we have, and that was probably not due to taxation (or else France would be seeing similar).
The wealthy and their henchmen can jump up and down and get all hyperbolic about it, but there's very little evidence that a millionaire exodus is happening, much less that it's caused by too much tax.