The stories of ancient people making friends include: the friendship between Chu Jiu, the friendship between men and women, the friendship between friends, and the friendship between chickens and millet. A friend who never leaves: Zhuangzi, a philosopher in the Warring States period, said when talking about Zi Si, Zi Xing, Gigi Lai and Zi Lai: "Who can be friends with the heart of inaction, the backbone of promising, and the bottom of death, and know that life and death are one." The four of them smiled at each other and felt that they were rebellious and became good friends with each other.

China's idiom "The Turn of the Chu Jiu", pinyin is chǔJi zh and Ji ā o, which means making friends regardless of wealth. The origin of the idiom: Biography of Wu You in the Later Han Dynasty by Ye Fan in the Southern Dynasties: "Gong Shamu came to the Imperial College for a visit and was penniless, so he became a guest servant and rented money. Yu Yu was frightened and decided to give it to Chu Jiu. "

The friendship between chicken and millet is a historical allusion, which is pronounced as J and sh ǔ zh and Ji ā o. The paradigm in The Biography of Loneliness in the Later Han Dynasty and Zhang Shao's deeds are all mentioned, so it left the good name of "the friend of chicken and millet". Describe the credibility.