Junior high school graduation examination, referred to as "senior high school entrance examination", is an examination to test whether junior high school graduates have reached the junior high school graduation level. It is a necessary condition for the issuance of junior high school diplomas. In China, these subjects are designated as subjects of national curriculum, and all of them are included in the scope of junior high school level examination. The senior high school entrance examination time is generally around June 20. The provinces and cities in China are not unified, which is calculated according to local time.

Xuanhan County, belonging to Dazhou City, Sichuan Province, is located at the southern foot of Daba Mountain in the northeast of Sichuan Basin, at the junction of Chongqing, Sichuan, Shaanxi and Hubei provinces. Dazhou Satellite City, 32km away from Dazhou downtown and 42km away from Dazhou Airport, passes through Xiangyu Railway, Chongqing-Shaanxi Expressway, Dawan Expressway and 2 10 National Highway. According to the data of the seventh census, as of 0: 00 1 1 in June 2020, the permanent population of Xuanhan County was 954,090.