韩愈 served on the staff of the chancellor
裴度 in the campaign of 817, which ended when the general
李愬 took the rebel city of
蔡州 in a snowstorm and captured
吴元济. The text gave the chief credit to Pei Du; Li Su's family complained, and the emperor had the stone ground off and recut with a new text by
段文昌.
李商隐's poem 《
韩碑》 defends the original.