How do you view the modern significance of Qingming Festival?

The Qingming solar terms are: Douzhiyi; the sun’s yellow longitude is 15°; the Qingming festival falls on April 4-06 in the Gregorian calendar. The "twenty-four solar terms" were originally determined by the direction of the top of the handle of the Big Dipper. The handle starts from the "Yin position" and then rotates clockwise. When the handle points to the "B position", it is the Qingming solar term. From the Han Dynasty to the early Qing Dynasty, the "average time method" was used to divide the solar terms, dividing the period between the winter solstice and the next winter solstice into 24 segments (each segment is 15 days), with the winter solstice as the starting point of the "twenty-four solar terms"; the Qingming solar term starts from the winter solstice Counting on, it is the 105th day after the winter solstice. The current "twenty-four solar terms" come from the "Dingqi Method" established more than 300 years ago (and still in use since 1645). It is determined based on the position of the sun on the zodiac. When the sun's ecliptic longitude reaches 15°, it is Qingming. intersection point.

"Huainanzi·Tianwenxun": "Fifteen days after the vernal equinox, when Dou Zhiyi B, the Qingming wind will arrive"; the "Qingming wind" in the article refers to the refreshing, clear and pure wind. "Hundred Questions of the Years": "Everything growing at this time is clean and bright, so it is called Qingming." "Almanac": "Fifteen days after the spring equinox, when the fighting fingers are ding, it is Qingming. At that time, everything is clean and clear. Qingming is a solar term that reflects the phenological changes in nature. At this time, the sun is shining, the vegetation is budding, the air is clear, the scenery is bright, and everything is visible, and nature appears. A vibrant scene. By the time of Tomb Sweeping Day, the climate in southern China has been refreshing and warm, and the land is showing the appearance of spring and bright scenery; in the north, the snow has also begun to break, and it has gradually entered a sunny spring