25,000. Inquiring about Yuncheng Education official website learned that due to the large population and many schools in Yuncheng County, there are 25,000 junior three students in most towns and villages. Yuncheng County, which belongs to Heze City, Shandong Province, is located in the southwest of Shandong Province and the northeast of Heze City, and in the lower reaches of the Yellow River, with a total area of 1.643 square kilometers.