《资治通鉴·唐纪·唐纪二十八》
春季正月，己巳，唐玄宗自东都洛阳启程北上；庚辰，玄宗抵达潞州，下令免除当地百姓五年徭役；辛卯，玄宗来到并州，下令在这里设置北都，将并州改为太原府，州刺史改称府尹；二月，戊申，玄宗回到晋州。
春，正月，己巳，车驾自东都北巡；庚辰，至潞州，给复五年；辛卯，至并州，置北都，以并州为太原府，刺史为尹；二月，戊申，还至晋州。
In the spring, on the first day of the first month (ji si), Tang Xuanzong left Luoyang, the eastern capital, to travel north. On the seventh day of the first month (geng chen), Xuanzong arrived at Luzhou, where he ordered the people to be exempted from corvee for five years. On the eighteenth day of the first month (xin mao), Xuanzong arrived at Bingzhou and ordered that this should be the northern capital. He changed the name of Bingzhou to Taiyuanfu, and the prefect of the prefecture to prefect of the municipality. In the second month, on the twenty-seventh day of the second month (wu shen), Xuanzong returned to Jinzhou.