Choose option B: Beginning of Spring.
The beginning of spring is the first of the twenty-four solar terms. Li means "beginning"; spring means warmth and growth. The twenty-four solar terms were originally formulated based on the "shift of stars". When the handle of the Big Dipper points to the Yin position, it is the beginning of spring.
The current solar term is determined based on the celestial longitude of the sun. When the sun reaches 315° of the celestial longitude, it is the beginning of spring, which is celebrated on February 3-5 of the Gregorian calendar every year. In the era of the stems and branches, the Yin month is the beginning of spring and the beginning of spring is the beginning of the year. The beginning of spring is the beginning of all things and the rebirth of all things, which means that a new cycle has begun. In traditional concepts, the beginning of spring has an auspicious meaning.
The beginning of spring marks the end of the winter when everything is hidden, and the beginning of spring when the wind is warm and the sun is warm, and everything is growing. In nature, the most striking feature of the beginning of spring is that all things begin to show signs of recovery.
Meteorological changes:
1. At the beginning of spring, the South Branch westerly jet in East Asia has begun to weaken, but the intensity and position of the North Branch westerly jet have basically not changed. The Mongolian cold high pressure and the Aleutian low pressure It is still relatively strong, but during the gap period under the influence of strong cold air, the frequency of southerly winds increases, accompanied by an obvious temperature rise.
2. From the beginning of the Spring Festival, the time sequence has entered spring. In nature and in people's minds, "spring" means wind and warm sun, and the recovery of all things. The most striking feature of the beginning of spring in nature is that all things begin to show signs of recovery.
3. At the beginning of spring, the dividing line between winter and spring in China (spring is considered when the daily average temperature reaches above 10 degrees Celsius for 5 consecutive days) is from Guilin, Guangxi to Ganzhou, Jiangxi. In the areas south of that line, there is a breath of spring at the beginning of spring, but 93% of China's land area is still winter. In Heilongjiang, spring often comes at the beginning of summer during Grain Rain.
4. The so-called beginning of spring is just an "intention". During the beginning of spring, the temperature begins to rise, and the sunshine and rainfall begin to increase. But for most of the country, it's just the beginning of spring.
Reference for the above content: Baidu Encyclopedia - Beginning of Spring