Vernal equinox manuscript tutorial: vernal equinox manuscript tutorial 1. The vernal equinox is one of the twenty-four solar terms and the fourth solar term in spring. The longitude of the sun reaches 0, and the festival is held on March 19-22 of the Gregorian calendar every year. The vernal equinox is of great significance in astronomy. On this day, the sun shines directly on the equator, and the northern and southern hemispheres are equally divided day and night.

Since then, the direct position of the sun has continued to move from the equator to the northern hemisphere. In the northern hemisphere, the day begins to be longer than the night, while in the southern hemisphere, it is the opposite. Climatically, there are also obvious characteristics. After the vernal equinox, China has entered a beautiful spring except the Qinghai-Tibet Plateau, Northeast China, Northwest China and North China.

"Equinox" has two meanings. One is "season sharing". Traditionally, spring is between beginning of spring and Changchun, and the vernal equinox is in the middle of the two solar terms, which just divides spring equally.

Another meaning is "equal day and night". At the vernal equinox, the sun shines directly on the equator, and the length of day and night is equal, each being 12 hour. The climate of the vernal equinox is characterized by warm and sunny weather. At this time, China folks have the custom of flying kites, eating spring vegetables and laying eggs. ?

During the vernal equinox, yin and yang in nature account for half, so the principle of balance between yin and yang should be followed in daily diet to maintain the balance, coordination and stability of body functions.

In addition, the climate in the vernal equinox season is very suitable for the reproduction and spread of various germs. It is very beneficial to human health and psychological adjustment to open doors and windows frequently to ventilate the house and plant some flowers and plants in the house to improve air quality and negative ion concentration. ?

The vernal equinox diet pays attention to "regulating its yin and yang, supplementing if it is insufficient, and diarrhea if it is surplus". Eating more fruits and vegetables at this time can supplement the consumption of vitamins and minerals in winter, which is of great benefit to health.

Compendium of Materia Medica records that Folium Artemisiae Argyi is warm, bitter and non-toxic, and has the functions of restoring yang, regulating qi and blood, eliminating dampness and dispelling cold, stopping bleeding and preventing miscarriage. It is also often used in acupuncture. At this time, it is also the most fertile season for yellow sand clams. In Guangzhou, clams are generally fried with leeks, which are crisp and tender.