"I mentioned that in the last ten years, I had lived and worked in Hong Kong, Indonesia, Italy , France, Germany and Portugal."
That you have lived in so many different countries sounds great (I've only ever lived in the UK and one other country).
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"It made me realise how difficult it is for people in the UK to live in other countries. And how that can lead to an isolated way of living."
But I would question you about this.
"Not one of them had ever lived or worked outside of the UK. They had always lived in the UK"
The same applies to most countries in the world. You mentioned the countries that you have lived and worked in during the past. Can I ask, just how many Germans, French, Italians etc have lived outside of their own countries?
I suspect that the number is no higher than the UK.
I don't know about Hong Kong but I would think the proportion of Hong Kongers who live abroad is much higher than for many other countries. But, even so, a very large percentage of Hong Kongers will likewise never have worked or lived abroad.