It has a total area of 3,914 square kilometers ( 1,511 sq mi ) and a population of 510,000 people .
Yuanzhou District , formerly Guyuan , is a district of Guyuan City in Ningxia , China .
Yuanzhou District has a total area of 3,914 square kilometers ( 1,511 sq mi ) and a population of 510,000 people .
Yuanzhou District , formerly Guyuan , is a district of Guyuan City in Ningxia , China .