Introduction to various types of bamboo slips: There are many categories of bamboo slips. Among them, Changsha Wu bamboo slips can be roughly divided into vouchers, books, letters, letters and other miscellaneous types according to their content; according to their shape, they can be divided into bamboo slips, bamboo slips and slippers. , signatures, seals and inspections, sealing mud boxes, etc. Bamboo slips have the largest number.