Liu Kai was headstrong and conceited as a teenager. He likes to talk big and despise everything. When he took the juren exam, he threw his article in front of the examiner's curtain. * * * There are about 1000 axes (a way of binding books in ancient times, articles are rolled up with scrolls, but the content is generally not too much), and they are loaded with wheelbarrows. On the day of the exam, I wore clothes (in the ancient imperial examination, all candidates were naked to prevent entrainment) and went into the examination room alone, intending to take this opportunity to surprise everyone and win fame. At that time, Zhang Jingshan was famous for writing articles. There is only one article in his sleeve, which is dedicated to the examiner in front of the door curtain. The examiner appreciated it very much and promoted Zhang Jing to "excellent". At that time, people made up a sentence: "A thousand-axis book written by Liu Kai is not as good as an article written by Zhang Jing".