Mathematics published by People's Education Press is the female parent, which is very close to Qingdao Edition in May 4th Movement in terms of difficulty and teaching progress. There are many units in the two versions, which can be used for reference in daily practice.

Qingdao, located in Jiaozhou Bay of Shandong Peninsula, is a prefecture-level city in Shandong Province and one of the five cities under separate state planning in China. As a coastal city, Qingdao has docks, beaches and reefs.