1, a 70-year-old man is called 70. Because in ancient times, 70 years old was the time to retire and go home, and the car that you usually took when you were an official was put away (hung up), which was also called the year of trailer. And because ten years old is ten years old, a 70-year-old person can be called a 70-year-old person.

2. Since ancient times, Gu Xi has been said by China people to mean 70 years old. It originated from Two Poems of Qujiang written by Du Fu, a great poet in Tang Dynasty. Du Fu chanted, "Life is seventy years old." 1200 years ago, Du Fu lamented that life was too short to live to 70 years old, which was very rare in ancient times. Later, in the Ming Dynasty 500 years ago, the famous painter Tang Yin (Tang Bohu) felt that he had lived a "rare life" after reading Du Fu's poems. He filled out a poem "Seventy Words", and my life is seventy years old.