Ten percent. Official website, an experimental middle school in Pingchao, Nantong, shows that most of the index students rank at 10% before grade, and the regulations vary from school to school. Pingchao Experimental Junior High School, Tongzhou District, Nantong City, is located in Nantong City, Jiangsu Province. Its school purpose and business scope are "implementing compulsory junior high school education and promoting the development of junior high school education in basic education".