1, "Healthy sleep and happy growth" mainly includes four aspects: choosing sleep posture to see fatigue, sleeping posture style, how to use sleep posture to promote height growth, height growth and sleep. It mainly talks about sleeping and sleeping posture, posture to promote height growth, long stretch, sleeping posture selection, sleeping posture practice, right lying posture, prone posture, supine posture, right lying posture, sleep fatigue, fatigue reaction and so on.