Written materials from Warring States to Wei and Jin Dynasties. It is cut from a long and narrow bamboo (with sawdust). Bamboo chips are called Jane, and sawdust is called letters or bamboo slips, which are collectively called Jane. Now bamboo slips are generally called bamboo slips. All the books are written with brush and ink. The book is three feet long (about 67.5cm) for writing imperial edicts and decrees, two feet four inches (about 56cm) for copying scriptures, and one foot (about 23cm) for writing folk letters. Important discoveries have been made in Changsha, Hunan, Jingzhou, Hubei, Linyi, Shandong, Dunhuang, Juyan, Wuwei and other northwest regions. Among them, books from the Eastern Han Dynasty were unearthed in Juyan.
That's Oracle Bone Inscriptions on the knife. . .
You can look at the introduction of this place:
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