The idiom story of doing our best comes from the "Biography of the Three Kingdoms Zhi Wei Zhi Jia Kui" Pei Songzhi's note "Wei Luo": "Do your best, and follow the Xuanke Fa." ”
Do your best, describe using all your strength to do something.
Yang Pei (杨沛), courtesy name Kongqu, was a native of present-day Lintong, Shaanxi. At the end of the Eastern Han Dynasty, he was a magistrate of Xinzheng, and later appointed as the commander of Changshe County after coming to Cao Cao's hands
One year when Cao Cao and his troops were passing through Xinzheng, there was no food, and Yang Pei helped Cao Cao raise a lot of military food, so Cao Cao liked him very much. After Cao Cao became chancellor, he promoted Yang Pei to changshe county commander. He was not afraid of the magnates and acted according to the law, and Cao Cao was very praised after he knew it.
For a time, the security situation in the capital Yecheng was very poor, and Cao Cao promoted Yang Pei to the position of Yicheng Ling (jing zhaoyin at that time). Before Yang Pei took office, Cao Cao asked him for a pre-appointment conversation and asked him how to do a good job in the security work in Yecheng. Yang Pei replied: "I will definitely do my best to do a good job in publicizing and popularizing the law, and require every ordinary person to abide by the law." ”