Why are there leaves and buds on trees in Guangzhou in spring?

There are deciduous trees and evergreen trees. Deciduous trees germinate in spring and grow leaves after autumn. The life cycle of leaves is only a few months, while evergreen trees have a long life cycle, usually 2-4 years, so they are evergreen. Evergreen trees usually lose their old leaves and grow new leaves in February-April every year, so they will see fallen leaves in spring.