Cao Song, a renowned figure in ancient Chinese history, has long been a subject of attention for his original name. However, due to the lack and confusion of historical records, the original name of Cao Song has remained a mystery for a long time. To uncover this mystery, we need to seek clues from existing historical materials and conduct reasonable analysis and reasoning. Firstly, let's look at the records in "Romance of the Three Kingdoms." In this novel, Cao Song is described as the father of Cao Cao and his original name is Cao Teng. However, this is merely a novel, and its authenticity cannot be relied upon. Therefore, we cannot use this as a basis to determine Cao Song's original name. Next, let's consider the records in official history. In historical works such as "Records of the Three Kingdoms," there is no explicit mention of Cao Song's original name. However, by analyzing relevant historical backgrounds and character relationships, we can make some reasonable inferences. According to the "Records of the Three Kingdoms," Cao Song was the adopted son of the famous eunuch Cao Jie in the late Eastern Han Dynasty. Cao Jie served as the eunuch leader during the reign of Emperor Ling of Han and wielded immense power. He adopted Cao Song and renamed him Cao Song. Therefore, we can infer that Cao Song's original name was not Cao Song, but a name he was given after being adopted by Cao Jie. Additionally, we can also seek clues from Cao Song's courtesy name. Cao Song's courtesy name was Ju Gao, which may have a certain connection with his original name. However, due to the lack of definitive historical materials, we cannot determine the specific relationship between the two. In conclusion, while we cannot accurately determine Cao Song's original name, we can confirm that Cao Song was not his original name but a name he was given after being adopted by Cao Jie. This conclusion not only reveals the mystery of Cao Song's original name, but also provides us with a new perspective to understand the historical background and character relationships of the late Eastern Han Dynasty.

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