What are the common methods and limitations of identifying ancient literature versions?

Most paper materials are yellow, which may be moth-eaten and have the taste of old ink. Other materials, such as silk and bamboo weaving, may be moth-eaten or discolored. Books will wear out if they are bound many times. You can use professional carbon fourteen identification method. Unearthed cultural relics are exempted. It is best to compare the original seal with the seal. See if the style, age and author are consistent.