《北史·列传·卷二十九》
此时，南海原有五六百户人家，居住在水上成为亡命之徒，号称为游艇子，高智慧、王国庆想去投靠他们。
时南海先有五六百家，居水为亡命，号曰游艇子；智慧、国庆欲往依之。
At that time, Nanhai originally had five or six hundred households, who lived on the water and became desperadoes, known as Youtuzi. Gao Zhihui and Wang Guoqing wanted to go to them for help.