Why do rural graves draw lots at midnight 12?

The reason for drawing lots at midnight 12 o'clock to sweep graves in rural areas is: to worship ancestors. In some traditional villages in China, people attach great importance to the ceremony of offering sacrifices to ancestors, and drawing lots is a link in the ceremony. At midnight 12, it is better to be close to nature and ancestors in a cool and quiet environment. At the same time, some vouchers, such as red and yellow lines, incense sticks and candle cannons, can show respect for ancestors.