1. When I was fifteen (I was determined to learn), when I was thirty (I was established), when I was forty (I was not confused). 2. "Historical Records" is China's first (biographical general history). It is a great work that combines literature and history with a high degree of democracy. Lu Xun called it (the historian's swan song, the unrhymed "Li Sao"). 3. The Beijing-Hangzhou Grand Canal has a total length of 1,750 kilometers. It is the earliest artificial canal in the world (the earliest to be excavated), the longest mileage, and the largest canal project in the world. Together with the Great Wall, the Pyramids of Egypt, and the Buddha Jaya Pagoda of India, it is also known as the four most magnificent ancient projects in the world. 4. In the first private school in my country founded by Confucius, the textbooks were various ancient books collected and compiled by Confucius. They are ("Poem", "Book", "Li", "Yue", "Yi", "Spring and Autumn") . 5. When addressing relatives of the other party, it is usually preceded by the word "ling", such as the other party's father (father), the other party's mother (lingtang), the other party's husband (honored husband), the other party's wife (linghuan), the other party's son (son). , the other party’s daughter (your concubine).