I can now answer my own question.

Covid testing at Yan'an hospital did continue through the holiday, and despite my wife's insistence that results were not available till next day I got them back same day.

I could not have done everything required without a Chinese speaking helper.

We had to start the day with registration.

It's 10 years since I've come to this hospital for anything so we were starting from scratch.

Creating a new patient record required my passport, which I brought with me.

The hospital's computer system did not have a big enough entry field for a foreign name. Once registered we simply lined up at another desk to get the requisition slip for the test.

We could have paid at the machines in the lobby but they didn't recognize things properly because of my name.

Those machines are also impossible to use by somebody who cannot READ Chinese.

Once paid we went outside to yet another line to get the testing swab/vial, then on to the 5th line for the actual test which was quick.

Getting the report back this afternoon was difficult even for my wife who can read Chinese.

The machines at the hospital are not exactly user friendly.

We did finally get the report.

I tested negative!

Does anyone know if Covid testing is done daily even during the holiday?

I'll be travelling this week and hope to get the test done on Monday which is till the 3rd day of the holiday period.

My wife insists that I use Yan'an hospital.

Back to the original topic of vaccine for foreigners.
My wife inquired about getting me vaccinated.

The doctor's reply was that at present they are only vaccinating people aged 18 to 59 because these people are most likely to travel more or interact with others more since this is the "working" population.

I'm a senior and well outside that age range.

There was no clarification of if/when there will be vaccination for foreign seniors.

I wonder why they specify that it must be the Chinese vaccine?

That's not available in every country.

It does look like we've strayed from the original question of this thread though.