Being in a good mood is a choice

This book mainly includes: Chapter 1: Finding the treasure of happiness in life; Chapter 2: Choosing a good mood and embracing your own happiness; Chapter 3: How to obtain a good mood; Chapter 4: A good mood ignites fighting spirit; Chapter 5: The wine of love becomes mellow due to one's mood; Chapter 6: A good mood makes the family more harmonious; Chapter 7: A good mood improves interpersonal relationships; Chapter 8: How to change a bad mood; Chapter 9: It's rare to be confused, learn to let go.