In ancient times, the sun was sacrificed at the vernal equinox, that is, on March 2 1 day of the Gregorian calendar every year, when the sun reached the zero degree of the longitude of the Yellow River, and the sun was directly at the equator, and day and night were basically the same length. Because the solar terms and vernal equinox are closely related to farming, people have always attached importance to them. There is a saying in an agricultural proverb: "Wheat rises in the spring breeze, and every moment is worth a thousand dollars". And it is the whole country, rich or poor, but there are small sacrifices at home. In "Ji Sheng at the Age of Emperor Jingdi", it is said that the spring equinox sacrifices the sun and the autumn equinox sacrifices the moon.
There is a custom of eating sun cakes in Zhonghe Festival. The fashion of eating sun cakes prevailed in the early Qing Dynasty. On the first day of February, after the sun comes out, every household will set up an incense table facing east or hang the magic code of the sun star in the yard for three or five bowls of sun cakes, and the male parents will lead the male family to burn incense and worship. Women are not allowed to participate, as the saying goes, "Men can't reach Yue Bai, and women can't stand the sky". There used to be a "Sun Palace" in Zuo 'anmen. On this day, people go to burn incense in succession. In fact, it was spring, and people took this opportunity to go out for a walk. About 50 years ago, this festival basically disappeared. It is said that in present-day Taiwan Province Province, sun cakes are still eaten during the Sino-Japanese Festival.