1, the winter solstice is the earliest one in 24 solar terms, but most people don't know that the origin of the winter solstice actually comes from a national capital planning. As early as more than 3,000 years ago, Duke Zhou began to use Tugui method to measure the shadow, and measured the position of the world in Luoyi, which was a move of political significance at that time, but it became one of the festivals that affected future generations for thousands of years.

2. When Duke Zhou went to Luoyang, he measured that Luoyang was in the world by Tugui method, and then began to divine the auspicious land of the state. According to the Book of Luoshu, the Duke of Zhou visited several places around Luoyang, and finally decided that Jianshui East, _ Shuixi and _ Shuidong were all good places to build a ancestral temple. The historical fact that the Duke of Zhou chose the site of Luoyi by surveying the landscape in Tugui was recorded in ancient books and was regarded by later generations as the method of sealing the country and founding the country.

3. The purpose of Tugui landscape survey is to find the unearthed center (the center of China). The essence of this method is that the tree is eight feet tall, and the length of the scene is five inches on the summer solstice; On the winter solstice, the scene is one foot three feet five inches long (that is, a benchmark with a height of 8 feet is erected. On the summer solstice, the shadow at noon is 1. How about the Department of Epilepsy in Nanshi Hospital affiliated to Henan University? The shadow at noon on the winter solstice is 13. 5 feet), measuring the depth of the soil, the sun is shining, seeking the ground, and testing at four o'clock. What is measured by this method is the theoretical position of Luoyang and Luoyi in the soil.

4. According to Zhou Gong's survey, the Zhou people made a detailed plan for the first national capital after the destruction of the Shang Dynasty. "Yi Zhou Shu Zuo Luo" contains: It is a great city in the soil, the south is in Luoshui, and the north is in Mangshan, thinking that the world is great. After the completion of the national society (capital, ancestral temple), the Duke of Zhou formulated the national etiquette system in detail in system of rites and music, Chengzhou Mingtang. According to records, in the Zhou Dynasty, November in winter was the first month, and the winter solstice was the first year to celebrate the New Year. That is to say, the Duke of Zhou chose the longest day of the year measured by Tugui method as the day when the new year began.

5. The ancients thought that since the winter solstice, the sun be the spirit of heaven and earth began to grow stronger and stronger, representing the beginning of the next cycle, which was the day of Daji Yantai Lamb Crazy Hospital. Therefore, later, during the Spring Festival, customs such as ancestor worship and family dinners often appeared in the winter solstice. The winter solstice is also called off-year. First, it shows that the year is approaching and there are not many days left. The second is to show the importance of the winter solstice. The winter solstice as a festival originated in the Zhou Dynasty, flourished in the Tang and Song Dynasties, and has been in existence ever since. The first month of the Zhou calendar is November in the summer calendar. Therefore, the first month of the Zhou Dynasty is equal to today's November, so there is no difference between worshipping New Year and He Dong. It was not until Emperor Wu of the Han Dynasty adopted the summer calendar that the first month was separated from the winter solstice. Therefore, it can also be said that the special winter solstice festival has only existed since the Han Dynasty, and it flourished in the Tang and Song Dynasties.