What is the length of day and night in Beijing on the winter solstice?

The shortest day and the longest night.

In the northern hemisphere where China is located, the sun shines directly on the Tropic of Capricorn from the winter solstice, and the sunshine is most inclined to the northern hemisphere, with the shortest day and the longest evening. After this day, the sun's rays gradually moved from the tropic of Capricorn to the north, and the days became longer day by day. The winter solstice is also a sign of the coldest period in winter, which is what people often say. There has always been a saying in China that it is "cold in March, hot in dog days".

On the winter solstice, the sun shines on the tropic of Capricorn, and the northern hemisphere has the shortest day and the longest night, so the winter solstice is also called the south solstice or "south solstice". Then gradually from the tropic of Capricorn to the north, the days in the northern hemisphere are getting longer day by day, and the southern hemisphere is just the opposite.

Extended data:

"Zuo Zhuan Xi Gong Five Years": "In the first month of spring, Xin Haishuo, the king of spring, arrived in the south." After the solstice in winter, white becomes longer and longer. Confucius' Justice in the Tang Dynasty abridged the sentence in the Book of Changes, saying: "The sun is born in winter, and it is better to use Yang and restore Yin." The ancients believed that the winter solstice coincided with the alternation of Yin and Yang, which was the climax of Yin (night) and the beginning of Yang (yang), which was a precursor of winter leaving and spring coming, and had the significance of connecting the past with the future. Therefore, the ancients attached great importance to the solar terms of the winter solstice.

References:

People's Network-Winter solstice has a history of 2500 years, and it was an official festival in the Han Dynasty.