How do solar terms become festivals?

According to legend, during the Spring and Autumn Period, Zhong Er, the son of the Jin Dynasty, went into exile to escape persecution. During his exile, he was so tired and hungry in a deserted place that he didn't even have the strength to stand up. After being detained for a long time, we couldn't find food. At this moment, everyone was anxious. Meson pushed to a quiet place, cut off a piece of meat from his thigh and cooked a bowl of broth for the son to drink. Zhong Er gradually recovered. When Zhong Er found that the meat was cut off from his leg by Meson, he shed tears.

Nineteen years later, Zhong Er became a monarch, and this is Jin Wengong in history. After Jin Wengong ascended the throne, he rewarded the ministers who followed him in exile, but he forgot to recommend them. Many people complained about meson push and advised him to admire it. However, mesons don't like people who strive for returns the most. He packed his bags and quietly went to Mianshan with his mother.

When Jin Wengong heard about it, he regretted it and personally took someone to ask for help. However, Jiexiu has left home for Mianshan. Mianshan Mountain is high and dangerous, with dense trees, so it is not easy to find. Some people say that Mianshan burned on three sides, forcing out mesons. The fire burned all over Mianshan, but there was no trace of meson push. After the fire was put out, it was found that Jiezitui was sitting under an old willow tree with his old mother on his back and died. Jin Wengong said, crying sadly. When I was packing, I found a bloody book from the tree hole, which read:? I hope your master is always clear. ? To commemorate meson tui, Jin Wengong ordered that this day be designated as Cold Food Festival. The following year, Jin Wengong led the minister to climb a mountain to pay homage, and found that the old willow tree came back from the dead. For the old willow tree? Qingming willow? And announced that the day after the Cold Food Festival was designated as Tomb-Sweeping Day.

Qingming was just the name of a solar term at first, and later became a festival to commemorate ancestors, which was related to the Cold Food Festival. The Cold Food Festival is an early festival in ancient China, which was established in the Spring and Autumn Period to commemorate the Jiexiu of the loyal ministers of Jin State. In fact, from the historical reality, the prohibition of cold food mainly reflects the remains of the ancient custom of changing fire in China. In primitive society, the ancestors drilled wood for fire, and fire was very rare. Due to the seasonal changes, the tree species used for making fires are constantly changing. Therefore, changing fire into new fire is a major event in the lives of the ancients. Spring and March are the seasons for changing fires, so people should forbid making fires before new ones come. The Han Dynasty called the Cold Food Festival a no-smoking festival, because people were not allowed to light a fire on this day, and candles were lit in the palace at night, and the fire spread to the homes of dignitaries.