It's so cold, why are some plants still green?

This has nothing to do with temperature. Plants can be divided into evergreen plants and deciduous plants. Plants that do not shed leaves in winter are called evergreen plants (such as Cinnamomum camphora, Holly, pine and cypress in Jiangsu, etc.). ), deciduous plants in winter are called deciduous plants (such as sycamore, Metasequoia glyptostroboides, elm, beech, etc.). No matter what temperature, plants will not change these characteristics, so it has nothing to do with temperature. I think the reason is that there are more evergreen plants living in our south.