假设你是李明，你有一个外国朋友大卫。 请给他写一封信介绍一个

Qingming Festival,i return home to worship my Festival is a folk the past,In the past,the Qingming Festival was called "Arbor Day".But Today,Chinese visit their family graves to tend to any underbrush that has are pulled,and dirt swept away,and the family will set out offerings of food and spirit the sacrifices at a family's home altar,the offerings at the tomb usually consist of dry,bland theory is that since any number of ghosts rome around a grave area,the less appealing food will be consumed by the ancestors,and not be plundered by strangers.