It is better to quit sooner rather than later, and quitting is better than not quitting From a health perspective for smokers, there are benefits to quitting at all ages. quitting before the age of 30 reduces the risk of lung cancer by 90%. Five years after quitting, the increased risk of oral and esophageal tumors due to smoking is cut in half. The risk of heart disease decreases even more rapidly after quitting, with smoking-related deaths halved within 1 year, and after 15 years of quitting, the absolute risk of various diseases is similar to that of never-smokers. Smoking causes lung function to decrease faster with age, and quitting mildly elevates lung function and decreases the rate at which it decreases. Regardless of when one quits smoking, those who quit will live a correspondingly longer life. The saying “quitting earlier is better than quitting later, and quitting is better than not quitting” refers to the fact that those who quit earlier can benefit more from quitting than those who quit later. Therefore, we advocate not smoking and quitting early. Xing Guohong, Department of Respiratory Medicine, Jinan General Hospital, Jinan Military Region, China