From the Han Dynasty to the Qing Dynasty, the average life expectancy of famous calligraphers was about 80 years in this era when the average life expectancy of human beings was 25 to 40 years old. For example, Liu Gongquan was 87 years old, Ou Yangxun was 84 years old and Yu Shinan was 80 years old. Yang Weizhen is 74 years old, 89 years old and 92 years old, and Weng Tonghe is 85 years old and 74 years old.
From the late Qing Dynasty to the founding of New China, the average age of human beings was 40 to 62, and the average life expectancy of famous calligraphers was 88 years.
In modern times, the average life expectancy of famous calligraphers has exceeded 90 years. For example, Qi Baishi, Huang, He Xiangning and Zhang are all over 90 years old, while Sun Mofo is a centenarian.
I wish I could help you,