I'm interested in the answer to Kelisi's question, but since I'll be going out in January and returning in late February or early March the rules may have changed a dozen times between now and then.

My wife and I both experienced those intense shivering spells.

It's a result of fever.

We both found the only solution, despite the fever, was to bundle up warm with an electric blanket.

The shivering passed in minutes after that.

Yup, my wife and I both tested positive.

We had the testing kits that our daughter ordered for us.
Started out with high fever (sometimes reached 40C), chills, lost appetite and really, really sore throat.

After 6 days I've finally got rid of the sore throat which made it difficult to swallow even water.

I didn't eat anything for several days and even now only consume in a day what would be less than I would normally have in a single meal.

Weight dropped 5 kg in just 3 days.

That's a bonus if I can keep it off.
Another plus was not expected.

Back in the spring and summer I was complaining about difficulty breathing.

Doctors tried all kinds of tests to determine why but to no avail.

One phase of Covid recovery involves coughing up a lot of phlegm.

That's mostly finished now and my breathing is better than it has been for months.
It now feels more like a mild cold.

posted on December 7th.

"Kunming Airport: From now on, the negative nucleic acid test certificate, health code, and itinerary card will be cancelled, and the "arrival inspection" will be cancelled!
According to the relevant regulations of the joint prevention and control mechanism of the State Council, starting from today, Kunming Airport will cancel the inspection of negative nucleic acid certificates, health codes, and itinerary cards of inbound and outbound passengers, and inbound passengers will no longer undergo nucleic acid testing on arrival.

Reminder : Please pay close attention to the relevant epidemic prevention policies of the destination city so as not to delay your itinerary."

@Lemon
You may never get those test results.

I was tested on the 6th for a flight on the 7th.

Never got results, but the hospital told me I was in one of those groups where somebody was positive.

I've never found out and never got any other response.