Dongming County is located in the southwest of Shandong Province. It is the first county where the Yellow River flows into Shandong. It borders Heze City to the east, Cao County to the southeast, Lankao County of Henan Province to the south, and Changyuan County of Henan Province to the west and north. It is adjacent to Puyang City and Puyang City, due to the northward flow of the Yellow River. It is at the intersection of Henan and Shandong provinces, and is known as the "Three Provinces Thoroughfare". The total area is 1,369.8 square kilometers and the total population is 740,000 (2003), mainly Han, including Hui and other ethnic minorities. The county currently governs 6 towns and 15 townships. The county people's government is located in Chengguan Town. The postal code is 274500, the administrative division code is 371728, and the area code is 0530