China's traditional holiday tomb-sweeping day. First of all, this day is a national legal holiday, everyone will have a holiday. Second, in the day of this day is to pay tribute to our ancestors. Many people will go to the grave. Sacrifice to the death of relatives and friends. Is the holiday in order to let every one of us have time to mourn the death of relatives and friends, even though the world does not exist. But to pay tribute to ancestors is brings us peace of mind.