《旧唐书·列传·卷九十》
张建封入朝觐见，详尽禀奏此事，德宗深表赞许而采纳；而户部侍郎、判度支苏弁逢迎宦官心意，因入宫奏事，皇上询问他的看法，苏弁回答道： 京师游手好闲的失业者有成千上万家，在本地均无谋生之业，仰赖宫市为生。 
建封入觐，具奏之，德宗颇深嘉纳；而户部侍郎、判度支苏弁希宦者之旨，因入奏事，上问之，弁对曰： 京师游手堕业者数千万家，无土著生业，仰宫市取给。 
Zhang Jianfeng went to the court to pay homage and reported this matter in great detail. Emperor Dezong highly praised and adopted it; but Su Bian, who was the Vice Minister of the Ministry of Revenue and in charge of financial matters, had curried favor with the eunuchs and so, when he went into the palace to attend the emperor, he was asked what he thought and replied: "In the capital there are tens of thousands of families of idle and jobless people, none of whom had any way to earn a living locally, who rely on the imperial market for their living."