Commentary Many years ago, I described to my grandma the many things in the United States that were absent in China such as churches, bars, and gyms. She didn’t know what a gym was. After I gave her an explanation, she said, “Those people who have more than enough to eat often do things for nothing. They just have an overeating problem that can be resolved by fasting for a couple of days.” My grandma’s generation experienced all the contemporary wars in China, and all the political and social campaigns after the Chinese Communist Party (CCP) seized power in 1949. During their lifetime, the main task was to get enough food to feed the family. It is understandable that they had to do a lot of physical labor, so there was no need for additional exercise. That explains why she could not understand why Americans have to find ways to …