@pschwede If they are seen as refugees then it would be EU regulated up to a certain quota.
Also that 1:80 you claimed to expiernce. When did the UK expiernce a 1:80 inflation in population over night?
Over a longer period of time it is very doable. It has more to do with how quickly it would occur (all in one action in a moment).
The only way it might be doable is to say anyone from HK who enters the country can **apply** for citizenship and it would be granted, but youd have to but a per-year quota on it to ensure you have time to integrate the new refugees as they come.