1. This is the living condition of most rural elderly people. 90 years old, still have to work in the fields, no pension, no medical insurance, no one to take care of. Forcibly said not to take medicine because I was reluctant to spend money. This is the case with a relative of mine in southwest Shandong.

2. This is not keeping in good health. My grandparents smoked all their lives and smoked a long pipe. They lived to be 93 years old and took care of their grandchildren in their 80s. They died peacefully on a snowy night. It is not easy for them to work hard all their lives.

3. Human life depends on genes. My grandfather is 89 years old. He has never taken medicine and can't help himself. My grandmother is 98 years old and my aunt is 7.80 years old. She is in excellent health and doesn't need anyone. I believe in longevity genes.

4. Longevity depends largely on people's longevity, that is, longevity gene. I have a wife who got tuberculosis in the 1970s. A daughter married her daughter and stayed at home skinny. She didn't eat much at every meal and lived to be 96.