What does beginning of winter's winter mouth mean?

Beginning of winter's winter patching is similar to "sticking autumn fertilizer"

With the arrival of the solar terms in beginning of winter, flowers and trees wither, insects lurk, and all activities tend to stop, saving energy for the coming spring hibernation. There is no such thing as hibernation, but people have a custom to make up for winter when they are in beginning of winter. In this best period of tonic, people make food supplements to supplement their physical strength and resist the cold in winter. Ordinary people can eat some high-calorie foods, such as cattle, sheep, chickens, ducks, fish and so on. After being busy for half a year, it's time to treat yourself well.