My mother also has a heart disease, which is not suitable for fatigue. Once tired, it is easy to gasp and increase the burden on the heart. The best place in Yunnan Snow Mountain is 4506 above sea level, which is a bit too much for young people, not to mention 75-year-old people. Even if you don't climb the snow-capped mountains, the altitude in ordinary places is very high, and altitude sickness will definitely occur, with little impact. My suggestion is not to go, you can do some less intense aerobic exercise near your home, or you can achieve the purpose of fitness. Filial piety does not have to go to tourist attractions, but lies in the dribs and drabs of life.

I wish I could help you, my friend.