An introduction to a work ticket: There were originally three corpses here. During the memorial sweep, a rotten plastic folder was found on the right chest of the middle corpse. Inside was a "Fang Family Cabinet" wrapped in layers of wax paper. "Work tickets for workers' expenses. Although it has been buried in the soil for more than twenty years, the writing is still very clear. In order to let it accuse the Japanese imperialist crimes of aggression to the people of the country and the world, the Chinese Revolution Museum (now the National Museum of China) moved the bones and the work stamps to Beijing for display in October 1965.