《旧唐书·列传·卷四》
实行这个方针定有三条好处：一是到无人防守的地方，军队万无一失；二是扩大地盘招募兵卒；三是唐军对王世充的包围自己就会解除。 
行此必有三利：一则入无人之境，师有万全；二则拓土得兵；三则郑围自解。 
Implementing this plan will definitely have three advantages: first, it will go to places where there are no defenders, and the army will be invincible; second, it will expand the territory and recruit soldiers; and third, the Tang army's siege of Wang Shichong will be lifted on its own.