《太平广记·卷五·神仙五》
他认为当时通行的篆体字，写起来很费事而用处不广，而且人们很难在短时期内学会使用篆字。
以为世之篆文，功多而用寡，难以速就。
He believed that the seal script that was used at that time was very time-consuming and inconvenient to write, and it was difficult for people to learn to use seal script in a short period of time.