@JanJal
Sorry for the slow response (just got out of hospital and sleeping a lot).
No, I didn't reinstall anything, just waited a day.

Yesterday my WeChat health code totally failed and would not let me re-enter without an error message in Chinese. This morning the app finally relented and let me get setup correctly, including my new passport number. I now get the green health code including the shield as well as a message that my vaccination status is complete.

@Fabey - no.

My WeChat does not recognize my new passport number so no nucleic acid results are shown, but it does give me the green health code.

Alipay doesn’t even show me an option to display the codes. The green health code is still displayed as a single line of text

I had a test done yesterday at Yan'an hospital as a pre-admission requirement.

My wife came with me as she also needed to be tested.

We did notice some differences, both between us and between the tests done in March.

In the emergency department last month I was given a throat swab, while my wife went through the line outside and got the wonderful nasal swab.

This time we both tested outside.

The process started by going to a machine in the lobby to "register" and get a receipt.

No problem, although my wife was using her Chinese ID while I used the hospital patient card.

We both got throat swabs outside!

I don't know why they changed.

Picking up the reports hours later was a job done by my wife since she can read Chinese and those machines inside don't have a language option.

No problem getting her own report by just flashing her Chinese ID on the machine, but my patient card was a different matter.

Most of the machines are now older versions and only two of them will produce a report using the patient card.

Seems a bit out of date.

Reports were Chinese only.
Foreigners were asked for passports in addition to the patient card.

@kmting
Before you go with oral check the requirements of your destination.

Some places require the nasty nasal swab.