1. Beginning of Winter is one of the twenty-four solar terms of the lunar calendar and one of the traditional festivals of the Han nationality; the time is between November 7 and 8 of each year in the Gregorian calendar, that is, the sun is at 225° of the Yellow Longitude. At this time, the sun is at declination -16°19, and the height of the sun at noon in Beijing is only 33°47. After the beginning of winter, the daylight hours will continue to shorten and the height of the sun at noon will continue to decrease. During the Beginning of Winter, Han Chinese people regard the winter solstice as the beginning of winter, and they need to take supplements to survive the harsh winter.

2. The beginning of winter is not only the time when harvest sacrifices and harvest banquets are held grandly, but it is also the season when the cold wind suddenly rises. There are customary activities such as "October New Year", "Qin New Year's Day", "Cold Clothes Festival", and "Harvest Festival". At this time, in the north, it is the Mengdong month when "the water freezes and the ground begins to freeze", but in the south it is the weather of Indian Summer.

3. The Beginning of Winter is a major festival in October. During the Han and Wei dynasties, on this day the emperor would personally lead his ministers to welcome the winter weather, commend and compensate the martyrs who sacrificed their lives for the country and their families, and invite the deceased Protect living beings and encourage the people to resist the plunder and invasion of foreign enemies or evil bandits. Among the Han people, there are customs such as worshiping ancestors, drinking banquets, and fortune telling. They offer seasonal delicacies to their ancestors to fulfill their obligations and responsibilities as descendants and pray for God's blessings. For the good harvest next year, the farmers themselves will also be rewarded for drinking and resting. Some customs on the Beginning of Winter have changed, while others still remain.