Why do rural people look older than urban people?

I grew up in the countryside and lived in the city. In my opinion, "rural people are older than urban people" can only be said to be a phenomenon. Speaking of it, "rural people are older than urban people" is a matter of course. Most rural people have to engage in manual labor, and their skin is definitely not good. City people either sit in high-rise offices, blowing air conditioners and drinking hot tea; Or leisurely shopping, bird walking, and square dancing. In addition, their living conditions are much worse than those of urban people, who pay attention to nutrition and health preservation, and rural people often make do with food when they are busy. There are also urbanites who dress themselves up, cut their hair and iron their clothes. Many women have to make up and make masks because they are afraid of wrinkles. Rural people don't pay much attention to these things, and they don't know how to wear them well. After all, they can only dress themselves up when visiting relatives, but they are generally neither fish nor fowl, and can't compare with people in the city.