《后汉书·列传·宦者列传》
徐璜于是向皇上诉苦，皇上大怒，剃去黄浮的头发，用铁圈束着他的颈，送右校劳改。
璜于是诉怨于帝，帝大怒，浮坐髡钳，输作右校。
Xu Huang thus made a complaint to the emperor, who was furious. He had Huang Fu’s hair shaved off, put him in an iron collar and sent him to the right school for labor.