Do one's best, and then die. Allusions: During the Three Kingdoms period, after the death of Liu Bei, the master of Shu, the incompetent A Dou (Liu Chan) succeeded to the throne. He only knew how to enjoy himself and left the domestic military and political power to Zhuge Liang. Zhuge Liang joined forces with Wu to attack Wei, marched south to Meng Huo, and actively prepared for two northern expeditions. On the eve of the last northern expedition, he wrote A Dou a model to show that he had done his best for his country and sacrificed himself after his death. Complete the big me, Kong Rong, let the pear, the small one is hidden in the forest, and the big one is hidden in the city.