China's Tomb-Sweeping Day originated in which dynasty?

The traditional Tomb-Sweeping Day in China began in the Zhou Dynasty and has a history of more than 2,500 years. Tomb-Sweeping Day was a very important solar term from the beginning. As soon as Tomb-Sweeping Day arrives, the temperature rises, which is a good season for spring ploughing and planting. Therefore, there is a saying that "melons and beans are planted before and after the Qingming Festival". Agricultural proverb "Planting trees is not as clear as Qingming". Later, because Tomb-Sweeping Day is near the Cold Food Festival, cold food is the day when people ban fire to sweep graves. Gradually, cold food and Qingming become one, and cold food has become another name and a custom of Qingming. Qingming, no fireworks, only cold food.