Which version should I buy in the next five thousand years?
There are many versions in the last 5,000 years, and the most classic is the version co-edited by Cao Zai 1979. This edition was published by Children's Publishing House and later by Shanghai People's Publishing House, but its content has not changed. Although you can't buy new books in this edition, you can find second-hand books or photocopies online. Later, many books written by others, or Cao, are not as classic as this version. Therefore, if possible, it is recommended to buy the version compiled by Cao for five thousand years 1979.