What is the origin of the word Qingming?

Qingming is one of the 24 solar terms in China. "Huainanzi" contains: "Fifteen days after the vernal equinox, the bucket refers to Qingming." Regarding the origin of the word "Qingming", when I was 100 years old, I asked, "Everything grows clean and bright at this time, hence the name Qingming." As a traditional festival in China, Tomb-Sweeping Day has inherited many established habits and activities, inspired numerous poets and poets to be poetic and picturesque, and left many famous sentences.

This little poem, without any difficult words and allusions, is written in very popular language and has no trace of management. The syllables are very harmonious and complete, the scene is very fresh and vivid, and the realm is beautiful and interesting.