There are various versions. Official website, Education Bureau of Zhoukou City, Henan Province, shows that the textbooks for junior middle schools in Zhoukou City are known as People's Education Edition, Mathematics Edition of West Normal University, English Edition of Foreign Teachers, Physical Chemistry Edition of Science and Education Edition, and other subjects are not unified versions, but they are all formal textbooks for the national unified examination. Henan Province, referred to as "Yu" for short, is the provincial administrative region of People's Republic of China (PRC). Zhengzhou, the capital, is located in the middle of China, bordering Anhui and Shandong in the east, Hebei and Shanxi in the north, Shaanxi in the west and Hubei in the south. Most of Henan is in the warm temperate zone, and the southern part has a subtropical continental monsoon climate. Henan is known as "the hinterland of Kyushu and the thoroughfare of ten provinces".