Is “The phrase 'Wu xia A Meng' and 'look at each other with new eyes'” true?
attested in history
According to the 'Records of the Three Kingdoms, Book of Wu, Biography of Lü Meng', Pei Songzhi's annotation quotes the 'Jiang Biao Zhuan' that Sun Quan urged Lü Meng to study, and after Lu Su heard his discussions, he sighed, 'You are no longer the A Meng of Wu' and looked at him with new eyes.
Lu Meng
In official history, he was a Wu general known for his diligence and the white-clothed river crossing, but in the novel, he is depicted as dying after being possessed by Guan Yu's spirit.