At present, all Chinese textbooks in China are compiled by the Ministry of Education. Due to the different educational systems, there are two kinds of educational systems: 63 and May 4th. Academic system: six years in primary school, three years in junior high school, and five years in junior high school. Most areas adopt the 63-year schooling system, and a few areas adopt the May 4th schooling system. At present, the known areas are: Shanghai, parts of Shandong (Weihai, Yantai, Qingdao) and other parts.

Version Description: Only the latest version of 202 1 is introduced. Because the publishing house can't update the edition every year, you can refer to it: first, look at the cover and title. If the cover is the same as the title of the book, it can basically be determined to be this version.