2. Excerpted from Twelve Years of Zuo Zhuan Gong Xuan. Lu Lanlu also wrote "Lu Lanlu is in rags". Over time, due to the expectation of literal meaning and misunderstanding when using idioms, it has become another way to write idioms.
3. Idiom story: During the Spring and Autumn Period, when he led an army to attack the State of Zheng, the State of Zheng sent a doctor, shù, to the State of Jin for help, saying that the Chu people were very proud and that sending troops could defeat the Chu army greatly. Shu Luan [Luan], the deputy general of the lower army, strongly opposed it, saying that the king of Chu often educated the people after he destroyed Yong, and not to forget the life of Ruoao, the former king of Chu, when he inherited the great cause. The state of Jin sent troops and was defeated by the Chu army.