What are some examples of being old and strong?

Emperor Guangwu of Han Dynasty seized the world by force, and he had a group of general advisers who were born in powerful landlords. They all helped Emperor Guangwu conquer the world and made contributions, of which 28 made the greatest contribution. After the death of Emperor Guangwu of Han Dynasty, his son Liu Zhuang painted portraits of 28 people on Yuntai in Nangong, which was called "Twenty-eight Generals of Yuntai". But besides 28 generals, there is also one general. Although his name did not stay on Yuntai, it is very famous in history. He is Ma Yuan in his prime. During the period of Wang Mang, Ma Yuan worked in Duyou, Fufeng County (located in the southeast of Xingping City, Shaanxi Province). On one occasion, the county magistrate sent him to Chang 'an to send prisoners. On the way, he saw that the prisoners were crying very sadly, so he let them go, and he had to lose his official position and flee to Beidi County to hide. Later, I started animal husbandry and agriculture there. In less than a few years, Ma Yuan became a big animal husbandry owner and a big landlord, raising thousands of cattle and sheep and saving tens of thousands of welcome food.