《宋史·列传·卷一百五十》
龚茂良驻守番禺，留正说： 法律规定：抢劫之赃物满了五贯要判死刑，海盗定罪还要加一等。
龚茂良守番禺，正言： 在法：劫盗脏满五贯死，海盗加等。
Gong Maoliang was stationed in Panyu, and Liu Zheng said: "According to the law, those who rob and steal property worth more than five guan will be sentenced to death, and pirates will be sentenced to one more level.