Tomb-sweeping day is one of the lunar 24 solar terms in the MuChun,with air into the winter solstice,namely after 106 days.Chinese traditional tomb-sweeping day began about the zhou dynasty,it has a history of more than 25.The vernal equinox ephemeris ":" after 15,dou refers to,cubed for clarity,all things are clean when and clarity,cover JingMing when gas qing,everything show,therefore the name." Qingming,temperatures,it is the good season,spring is injected with "clarity around,kind of melon kind beans," said.Tomb-sweeping day is a holiday,the traditional ancestor worship activity for grave.On May 20,2006,the MinSuJie nikkei the approval of the state council listed in the first national nonmaterial cultural heritage list.