The texts were buried in tomb number three at Mawangdui (which was sealed in 168 BC), and were hidden until their late-20th-century discovery. Some were previously known only by title, and others are previously unknown commentaries on the I Ching. In general, they follow the same sequence as the received versions, which were passed down by copying and recopying texts collected and collated during the fifth century AD. However, in some important aspects they differ noticeably from the received texts known before their discovery.
