《资治通鉴·汉纪·汉纪四十》
安抚外族和与异国交往，人才最为重要。现规定：边疆人口十万以上的郡，每年推举孝廉一人；人口不足十万的郡，每两年推举孝廉一人；人口五万以下的郡，每三年推举孝廉一人。 
抚接夷狄，以人为本，其令缘边郡口十万以上，岁举孝廉一人，不满十万，二岁举一人，五万以下，三岁举一人。 
Anfu foreigners and dealing with foreign countries are the most important talents. The regulations are now stipulated: counties with a border population of more than 100,000, recommend one Xiaolian each year; counties with a population of less than 100,000, recommend one Xiaolian every two years; counties with a population of less than 50,000, recommend one Xiaolian every three years.