《明史·列传·卷二百零八》
后唐时代，王建代替了高氏，兼并了新罗、百济等地，迁居到松岳，称为东京，而把平壤称为西京。
后唐时，王建代高氏，兼并新罗、百济地，徙居松岳，曰东京，而以平壤为西京。
During the Later Tang Dynasty, Wang Jian replaced Gaoshi and annexed Silla, Baekje, and other places. He moved to Songyue and named it Dongjing [Eastern Capital], while Pyongyang became Xijing [Western Capital].