《汉书·传·西南夷两粤朝鲜传》
公孙遂到了朝鲜，左将军荀彘说： 朝鲜早就该攻下来了，攻不下来的原因在于楼船将军屡次不按期会师。 
遂至，左将军曰： 朝鲜当下久矣，不下者，楼船数期不会。 
“The appointment of Lieutenant General Youqu to the command of our Korean expedition was a mistake which should never have been made,” said Lieutenant General Xun Zhe, when Gongsunshen arrived in Korea. “The failure to make any progress with the campaign in the east can be laid entirely at the feet of the General of the Tower Ships, who has failed to meet his obligations on several occasions.”