《太平广记·卷四百八十四·杂传记》
那一年正碰上三年一次的全国大考，皇帝下诏招收四方的杰出人才，公子选试了 直言极谏科 。
其年遇大比，诏征四方之隽。
That year happened to coincide with the once-in-three-years national grand examination, the emperor issued a decree to recruit outstanding talents from every quarter, and the son selected the Utter Candid Advice as the subject of his examination.