《新唐书·列传·卷五十二》
以往贞观、永徽年代，拿国家俸禄的人少，每年漕运二十万石就足够了。如今国用日益增多，漕运增加了几倍，还不够供给。陛下多次巡行东都，那里积储较多。
往贞观、永徽时，禄禀者少，岁漕粟二十万略足；今用度浸广，运数倍且不支，故数东幸，以就敖粟。
In the past, during the Zhenguan and Yongwei eras, there were fewer people who received state salaries, so 200,000 shi of grain transported by water each year was enough. Now that the national use of rice is increasing day by day and the transportation of grain by water has increased several times, it is still not enough. Your Majesty has traveled to the Eastern Capital many times, and there is a lot of accumulation there.