《新唐书·列传·卷八十三》
原先，南海商人一到，大帅一定索取象牙、犀角、明珠、上等珍品而压低价。
南海舶贾始至，大帅必取象犀明珠，上珍而售以下直。
Originally, whenever a merchant from Nanhai arrived, the commander would demand ivory, rhinoceros horns, bright pearls, and other rare treasures at low prices.