＂Rise at the cock's crow ＂is a traditional Chinese idiom from the story of Liu Kun and Zhu Ti,two heroes in Western Jin Dynasty(265-361 A。 D)。Both young men were ambitious。diligent,talented in literature and both worried about the nation's fate。Their heroic deeds were put down by the authors of historical writings。 As the local officials in charge of secretary works they enjoyed close friendship and once shared the same bedroom。Every night they would get up to practise fencing as soon as they heard the cock's crow so as to make themselves skilled enough for the military career later。 For thousands of years,the idiom ＂Rise at the cock's crow ＂has always inspired ambitious people to work hard and make great achivements。 *涉及到中国历史朝代最好加上时间断限，以给人直观的印象。 *象＂同寝共被＂这样的说法要处理得文明一些，免得老外认为有***嫌疑 。