As far as I know, Hefei uses people's education edition, Beijing Normal University edition and foreign language edition, and now all the languages in the province are compiled by people's education edition. Mathematics is available in both the Soviet Education Edition and the People's Education Edition. In English, Hefei uses the foreign research version, with a slightly higher difficulty coefficient. Most people's education editions used in other regions are relatively less difficult. But many versions are just different in order and content. After all, there are exam papers in the province.