Why is the winter solstice not the latest sunrise and the earliest sunset?

After the "summer solstice" in the northern hemisphere, the sunrise time becomes later, and the sunset time is advanced day by day until the winter solstice. This is the year with the shortest day and the longest night in the northern hemisphere all year round. After the solstice in winter, the days will get longer day by day. The "solar terms" in the China lunar calendar are mainly based on the laws of the sun's movement.