They seemed to not have a way to phone home, so more than likely China’s plan was to recover the balloon to get the data. That may be what you recall. For all we know they had been doing so for years successfully.
But they were definitely spy balloons.
The 2023 incident is pretty well written up on Wikipedia[1].
There was one Chinese surveillance balloon that was shot down. Subsequent shoot-downs of balloons over the arctic and Great Lakes were not attributed to China - one that was recovered was definitively identified as a private weather balloon.
There were also previous Chinese surveillance balloon overflights - as well as one over Central America - that were not shot down.
[1] https://en.wikipedia.org/wiki/2023_Chinese_balloon_incident
Normal weather balloons are 20ft in diameter. This one was 200 feet in diameter and carried quite a payload - about the size of a couple of box cars. Additionally it had propellers and the ability to steer itself.
> There was no proof it was a spy balloon.
There was a preponderance of evidence - from the route of the balloon (over US strategic nuclear missle silos), to the equipment that was recovered to radio intercptions. https://en.wikipedia.org/wiki/2023_Chinese_balloon_incident