The risk of lung cancer decreased progressively between 2 and 15 years after quitting smoking, after which the incidence rate was equivalent to that of lifelong nonsmokers; 6 months of smoking cessation resulted in lower values for all stratification factors of cardiovascular disease and improved atherosclerosis; 1 year of smoking cessation reduced the risk of coronary heart disease by 50%; 1 year of smoking cessation reduced the risk of stroke recurrence by 20%, and 5 years of smoking cessation reduced the risk of stroke recurrence to that of nonsmokers; The risk of coronary heart disease, myocardial infarction, and sudden cardiac death was significantly lower in smokers who quit for more than 1 year; smoking cessation in public places reduced the hospitalization rate of acute myocardial infarction by 19% in the region.