Shangjing Longquanfu or Sanggyeong Yongcheonbu (Korean: 상경용천부), also known as Shangjing/Sanggyeong, Huhan/Holhan Fortress, is an archaeological site in Ning'an, Heilongjiang, China. It was the capital of the Balhae (Bohai) Kingdom from 756 to 785, and again from 793 to 926.