What I realized after turning 30: 1. When you reach middle age, you will find that life is all about cause and effect. Adults always want to think about any decision they make first, and one day in the future, you will think of a decision that was either light or heavy at the time; 2. When you encounter a hurdle that you feel you can't overcome, do everything you can to overcome it, and you will find that there is no hurdle that you can't overcome; 3. Do not participate in the cause and effect of others, do not be a saint, take care of your own one and a half acres of land, and decisively refuse anything that makes you uncomfortable; 4. Not being a good teacher, not arguing with people with limited knowledge, spending more time is a waste, focusing on one's own family and worthwhile things; 5. Be kind and sincere to others, do not make things difficult for others, do not argue or argue with others, only make choices, do not make changes, and stay away from all bad people and things; 6. Improve your cognitive and investment abilities, maximize your strengths, get close to like-minded people, have a grateful heart, and you will find that a word from others may bring you opportunities to move forward and meet influential people; Believe that you are the greatest alpha!