What is the true meaning of Qingming?

It is related to "weather phenology". The introduction to astronomy in the book Huai Nan Zi in the Western Han Dynasty contains "On the 15th day after the vernal equinox, when you point to B, the wind will clear up"; The record of Qingming in Hundred Questions at the Age is that "everything grows clean and bright at this time, so it is called Qingming". Although the descriptions in these two ancient books are different, they actually say the same thing, that is, "everything presents a clean and clear phenomenon and feeling." Tomb-Sweeping Day is the fifth of the 24 solar terms. At this time, the sun has crossed the equator for two weeks (the vernal equinox solar terms hit the equator directly), and the sunshine in the northern hemisphere is getting longer and the days are longer and the nights are shorter. After beginning of spring, after three solar terms: rain, fright and vernal equinox, the cold deep in the earth in winter is pulled out from the surface by the warmth brought by the sun and dissipated. At this time, spring flowers are blooming, thick green covers the earth, the sky is clear, the air is fresh, everything comes into being at the right time and is full of competition. It can really be described as "the wind is clear and the gas is positive" and "thriving".

2. Understand from a humanistic perspective. "Qing": the sky is light and clear, but it rises. The sky is clear and not turbid, transparent and bright; God is pure and selfless and blessed by all things. "Ming": be familiar with things and follow the trend. The ancients used the word "Qingming" to declare that future generations should be clean and honest, do things clearly, and be "clean and honest".

Qingming sacrifices ancestors, communicates with ancestors, and lets ancestors judge whether the behavior of strangers in the world is honest and clean. As the saying goes, people are doing, and the sky is watching. The sky contains ancestors. Ancestors only bless those descendants who are upright and clear. Therefore, people who post notices should always be vigilant, work hard and always be vigilant. The law has always been strict.