Lord Mengchang was wise and had sensible convictions. His incisive remarks are enough for him to achieve long-lasting fame. One example was when he refuted his father for ill-advised practice of killing babies born on the fifth day of the fifth month. Another is his criticism of his father's saving his wealth to bequeath it to some unknown offspring in the future rather than bringing in wise men for the public good. The Lord Mengchang was skilled at maintaining household-retainers. Sima Qian said he "was fond of guests and much pleased with himself because of it." He was able to escape from Qin through guests' petty skills and tricks. And through Feng Huan's elaborate ploy, he was also reinstated as the Prime Minister of Qi. Yet because of his lofty fame, he has been misunderstood due to three rumors about him for over two thousand years: first, he was criticized when passing through Zhao and so he sent people to kill all of the people in the county of Zhao; second, he sent a letter to the Prime Minister of Qin, Wei Ran, and got him to admonish King Zhao of Qin to attack Qi; third, he participated in the expedition where Yan, Zhao, and three other countries defeated Qi. Actually, these are just incredulous rumors. In addition to the interpretation of the meaning of the text, this article also tried to make these rumors clear for Lord Mengchang.