What does "Cao Cao Mengde" mean?

Cao E's moral integrity, Meng Mu's virtue or Cao Fu's character, and Meng Mu's moral significance Cao E came from Shangyu in the Eastern Han Dynasty. Her father drowned in the river, and her body was not seen for days. At that time, her filial daughter Cao E was only fourteen years old and cried by the river day and night. 17 days later, he also threw himself into the river on May 5, and fished out his father's body five days later. This was passed down as a myth, and then to the governor of the county government, who made it a monument for disciple Han Danchun to make a eulogy. Therefore, the village where he lived was renamed Cao 'ejiang Town, and the river where he mourned his father was Cao 'ejiang, and a temple was built to comfort his filial piety. Meng Mu (? ~ 3 17 BC) Mencius' mother. During the Warring States period, people were famous for being good at teaching. Mencius lost his father at the age of 3 and grew up under the care of his mother, becoming a later Confucian aspirant. Meng Mu also left many stories about his godson, such as "Three Movements of Meng Mu" and "Breaking the Godson". I heard an old calligrapher, Mr Yan Zengrui, tell such a story. An old lady died. At the funeral, three relatives, six friends, seven aunts and eight aunts, and relatives from all walks of life came. Suddenly, a relative and friend presented a four-character scroll. In the cashier's office, several gentlemen who thought they had seen the world and had some ink in their bellies were blindsided and wrote the four characters "Cao" on the scroll. All the people are talking about it. Cao Cao Cao Mengde is a treacherous white-faced traitor. It's really bad to use him to describe our amiable and virtuous old lady. Put it aside and return the gift money to him, regardless of his meal. Some people think it makes sense, and they clamor to start work on the person who carries the basket. Or the pressure of the old prime minister. Guys, don't be arrogant. This is our fault. It's not that there is something wrong with what others say, but that we haven't seen enough knowledge. When he said this, everyone in the room bowed their heads and stopped talking. The old prime minister quickly sent diligent people to ride fast horses to consult the old juren in the neighboring village. When Mr. Yan was telling a story, I also had a half-baked guess. "Cao Cao Mengde" and "Saint Amethyst" said: "In the past, Meng Mu chose neighbors, but his son didn't learn, which broke the machine." This "Meng De" is probably Meng Mu's moral character, but how to explain this "Cao Cao"? A mystery. Mr. Yan went on to say that the old juren took the four words handed over by the bearer and meditated for a long time. He said, "Ban Chao's sister married Cao Fu in the Han Dynasty and gave birth to a son. Soon her husband died young, and Cao Ban's family brought up her son's life, and she had no money for his education. She reluctantly cut off her hair and made her son a talent; Similarly, Meng Mu is a model of teaching children well. These four words represent the character of Cao Fu Ban and the character of Meng Mu. " When people came back and left, everyone in the accounting office understood the ending and admired the depth of knowledge of the person who provided it. Now it seems that those meaningful words can only be hidden in the bookcase, so that those "immortal" and "immortal" words can climb the ladder.