I think the problem itself is wrong. In winter in the northern hemisphere, the farther north the northern hemisphere is, the later the morning is. In winter in the southern hemisphere (that is, in summer in the northern hemisphere), the farther north, the earlier the dawn, which is a meaningful discussion (the position of the direct point of the sun should be fully considered).

Winter in China refers to the three months of 12, 1 2. In these three months, the direct point of the sun has been in the southern hemisphere. Relative to the north of the direct point of the sun, the farther north, the later the sunrise, the shorter the day and the later the dawn.