It is 66 sessions of rejuvenation medical exercises for middle-aged and elderly people. It is a particularly good sport for the elderly. Music movements have hints and are easy to learn. Exercise all organs and joints of the whole body.

I am the beneficiary of aerobics. About 5 years old, all joints ache. It is difficult to squat. Affect life.

I practiced for a year, and everything recovered except a slight pain in my knee.

you can find it by typing "66 medical exercises for rejuvenating middle-aged and elderly people" and Baidu.