They’re not orange.
This was a ripe (and pretty tasty) orange. I would have thought it needed a few weeks to ripen (or was actually a lime) but it turns out that oranges in China are often green. I guess that’s why the Chinese word for the fruit orange (橘) is different than for the color orange (橙) although I just noticed that the two characters are pretty similar and both pronounced ju.
I remembered to get a picture of a cut one so I’ll stick it here.