A manual letterpress printing machine from the Beijing Art Museum's Wanshou Post Office recently attracted a large number of visitors to the China International Fair for Trade in Services. Li Fuzhen, the handler of this machine, said it faithfully replicates the manual letterpress printing craft from 400 years ago, allowing the user to gain a visual understanding of how ancient Chinese printing materials were produced. The printed design features the "Double Happiness and Longevity" motif, which