Why is Qingming a very sad festival?

During the Qingming Festival, peaches and plums are in full bloom, smiling like flowers, but Noda's wild grave is a desolate scene.

The full text of this poem is "Qingming Festival, peaches and plums laugh, Noda wasteland is only sad." Thunder stung dragons and snakes, and the original vegetation in the suburbs was soft after the rain. It's unfair for people to sacrifice my arrogant concubine and wife, but it's unfair to burn them. Wise men and fools have known who it is for thousands of years, and they are full of eyes. "It's Huang Tingjian's Qingming Festival.

Tomb-Sweeping Day, actually one of the 24 solar terms, is based on agricultural civilization. Everything is full of vitality, clean and beautiful, hence the name, which is one of the three days from April 4 to April 6 in the Gregorian calendar. This day is mainly an activity to worship ancestors and sweep graves. In addition, there are some intense activities, such as swinging, playing cuju, playing polo, flying kites and fighting cocks. This is mainly the best spring. On the one hand, we should not forget our ancestors, on the other hand, we should not forget our own future and development. On Qingming day, it is often a breeze and drizzle.

There is a saying that "peaches and plums laugh at festivals, and Noda wasteland is only sad". Life and death are in a poem, just like the meaning of Tomb-Sweeping Day.