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How many out of ten thousand people can live to the age of 80? How many years old is considered longevity? Tell you the answer
Editor's note: This article is an exclusive first release of the original headline, please do not plagiarize or reprint itPrefaceLao Wang, 78 years old this year, is a retired worker from a factory. His children are usually not at home, and he and his wife have always been living and exercising together
