According to the inquiry of the subject network, the Chinese and mathematics books in Changtu County, Liaoning Province are all PEP editions.

Liaoning province, referred to as Liao for short, is the capital of Shenyang, which was called Fengtian in ancient times. It is a provincial administrative region of China people. Liaoning is located in the southeast of China, bordering the Yellow Sea and Bohai Sea in the south, separated from North Korea by a river in the east, and across the sea from Japan and South Korea. It is the only coastal and border province in northeast China.