Also our son's kindergarten (and I assume every other institution) alerted of outbreak in Ruili and had everyone report if anyone from their household has been in Ruili in past weeks.

Besides practical health reasons and travel restrictions during he pandemic, I'm sure that UN agencies are also closely watching for WHO's forthcoming report on the biological origins of the pandemic. There are makings of a PR disaster for both UN and China.

If "having to" leave the country amounts to being deported, I'm fairly certain that it goes to same category with the Chinese government paying the flight tickets in order to get the foreigner out of here. That is, they would pay to get you shot.

Under milder circumstances for the exit I don't know, but I suspect that having to leave the country will not allow one to get a jab any faster than foreigners here in general - unless one is in position of some added privileges.

Based on my experience, as long as the text content contains all the needed information in readable form, the form(at) is not so important.

But I do assume you'll be better off with a printout from Word or whatever, rather than hand-written...

For our company registration and subsequent administrative functions, we've had to prepare power of attorney documents on number of occasions, but I don't recall it ever requiring notarization or other official thing - and I believe it is notarization that you are looking for.

Self-written, signed and stamped A4, and our bank and other offices have been fine with it.

But perhaps your purpose for this is different, and it will require notarization - or even legalization elsewhere, if it is for international purpose.

For some personal documents that have required notarization, the office we have used is this:

www.gokunming.com/[...]