"Huainanzi-Human Training" "Because I died for 500 thousand ... three years, I can't read armor, so Lu Lin can't transfer it." Since Qin Shihuang sent troops to Lingnan for three years, the problem of water transportation has not been solved, which shows that Lingqu has not been excavated and Qin Jun has not settled in Lingnan. It can be inferred that Qin Shihuang sent troops to Lingnan at least in 2 17 BC or even earlier, assuming it was 2 18 BC (the twenty-ninth year of the first emperor).
Historical Records-Biography of South Vietnam died in the fourth year of Jianyuan (former 137). "That is to say, Zhao Tuo died in 137 BC.
Assuming that Zhao Tuo and Tusui go south at the same time, when Zhao Tuo 18 years old (2 18 years ago 18 years old), the life span of Zhao Tuo is about 218-137+18 = 99 years old.
Suppose Zhao Tuo didn't go south at the same time as Tu Youyou, but it was a little late. According to Records of the Biography of South Vietnam, Ren Tao, the captain of Nanhai, died in Qin Ershi, and Zhao Tuo, commander of Longchuan, was chosen as his successor. Then Zhao Tuo's age at this time is probably not less than 25 years old, and the time is about 209 BC (the first year of Qin Ershi, the year when Guangwu Chen Sheng went to war), so Zhao Tuo's life span is about 209- 18.
This is my calculation, and I don't know if it is correct.