China people have a historical tradition of cautiously pursuing the future and expressing filial piety. Tomb-Sweeping Day has a long history of sweeping graves, offering sacrifices to ancestors and thinking about time. As the saying goes, "it's a great event of the country to be honored by offering sacrifices", as early as ancient times, emperors and governors attached great importance to the ceremony of offering sacrifices to ancestral temples. The Book of Songs: "I am a coward, I am a bandit, I lost my parents and gave birth to me." It can be regarded as the earliest grave-sweeping poem. Children in front of their parents' graves will naturally feel the kindness of "my father gave birth to me and my mother bowed to me" when they see lush grass. The Zhou dynasty ruled the country by courtesy, which was extremely complete, and the funeral ceremony was an important part of it. Xiaoya Chutz: My warehouse is profitable. I am a billion dollars. In my opinion, eating and drinking is to enjoy sacrifice, wealth is to be jealous, and introduce the scenery. Honor Sun Youqing, repay kindness with blessings, long live! " Poetry describes the scene of Zhou dynasty nobles sacrificing their ancestors at home; "The Book of Songs New Nanshan" "There are melons in the battlefield. It was the ancestors of the emperor who undressed and sacrificed. Great-grandson Shoukao was blessed by heaven. " This paper describes the scene of Zhou people sweeping graves and offering sacrifices at ancestral graves in the suburbs. In the Qin and Han Dynasties, tomb sacrifice has become an indispensable ritual activity. Since then, emperors of all dynasties have regarded funeral rituals as a part of the strategy of governing the country. "Qingtongli" says: "On the New Year's Eve, the Cold Food Festival and the First Frost Festival, when you worship the grave, you will serve your bed with vegetarian food, and you will seal the tree in the week with wine and a device for cutting vegetation, so it is called sweeping the grave." By the time of Xuanzong in Tang Dynasty, sweeping graves had become an important social custom. Emperor Xuanzong of the Tang Dynasty regarded cold food as one of the "five rites" at that time. According to the imperial edict of the Tang dynasty, "cold food is buried in the ground, and the ceremony is unknown. It has been passed down in modern times and gradually became a custom. There are people who are not suitable for temple fairs. Why should they show filial piety? It is advisable to go to the grave. " By decree, the imperial court designated the Cold Food Festival in front of Tomb-Sweeping Day as the folk custom of sweeping graves. Because of the connection between cold food and Tomb-Sweeping Day, the custom of Cold Food Festival has long been associated with Tomb-Sweeping Day. Cold food prohibits fire, and fire is taken in Qingming, and grave sweeping has also expanded from cold food to Qingming, so cold food is called Qingming. Every time in Tomb-Sweeping Day, "the roads in the fields are full of scholar women. If beggars help them, they will get their parents' graves." (Liu Zongyuan's book with Xu Jingzhao). In the Ming Dynasty, "A Brief Introduction to the Scenery of the Imperial Capital" also said: "In March, men and women sweep graves and worship. After the sedan chair, hanging ingots, the road is full of embarrassment. Worshipers, mourners, weeping, weeding, adding soil to graves, burning ingots several times, and buying graves with paper money. If you can't see the paper money, it will be a lonely grave. After crying, don't go back, go to the fragrant tree, choose the garden, sit down and get drunk. "

In the traditional culture of China, traditional festivals are divided into three categories: people, ghosts and gods. People's festivals include Spring Festival, Dragon Boat Festival and Mid-Autumn Festival, ghosts' festivals include Tomb-Sweeping Day, Mid-Autumn Festival and Clothing Festival, and gods' festivals include March 3rd, June 6th and September 9th. People's Day focuses on personnel activities, Ghost Day focuses on chasing the dead, and God Day focuses on offering sacrifices to the gods. Ancestor sacrifice has always been widely valued. Why did our ancestors attach importance to ancestor worship? According to the Confucian concept, "sacrifice is the foundation of teaching", and sacrifice is an important means to maintain ethical education and cultivate filial piety. As Ceng Zi said: "Be cautious and pursue the distance, and the people's morality is thick." In the 19th chapter of The Doctrine of the Mean, "Things die like things live, things die like things exist, and filial piety is the most important thing", while in the Book of Rites of Xunzi, "The mourners have nothing to do, know the meaning of death and life, send them to mourn, and eventually hide them ... Things are decorated at the beginning, died at the end, and filial piety is the way for saints", although Confucius does not believe it. In China's folk customs, there is also a saying that "if you don't worship your ancestors in Qingming Festival, you will become a dog and a pig when you die" to warn and curse those who try not to fulfill their obligation to worship your ancestors.