Chen Mo traveled to the Qin Dynasty and became a bamboo slip carving craftsman in Xianyang West Market. Every day, I use a carving knife to deal with the hard and slippery bamboo slices. My index fingers are calloused and my eyes are blurred, but my wages are only enough to exchange for two liters of millet. Until that day, he saw Li Zheng carrying a bundle of newly made slips to the county government - a full thirty kilograms, requiring two people to carry it, and recording only a household registration change document of about a hundred words. Chen Mo touched the crumpled A4 paper brought from modern times in his arms. On it was a structural diagram of a simple movable type printing machine drawn with a ballpoint pen. He squatted at the door of his adobe house and used charcoal to make a calculation on the ground: the bamboo slips consumed in Xianyang City every year could fill the front hall of three Epang Palaces.
