Coronary heart disease is a kind of heart disease in which coronary arteries are severely atherosclerotic narrowed or blocked, or combined with spasm and thrombosis on this basis, resulting in narrowing of coronary artery lumen and causing insufficient coronary artery blood supply, myocardial ischemia or myocardial infarction. Coronary heart disease is the leading cause of death in Western countries. Although China is a low incidence country for coronary heart disease, the incidence and mortality rate of coronary heart disease has been increasing year by year in recent years and has become the main cause of death. Epidemiological studies of coronary heart disease show that there are obvious regional differences in the incidence and mortality of coronary heart disease events in China, with the mortality rate of coronary heart disease being higher in urban than in rural areas. The northern provinces and cities in China are higher than the southern provinces and cities, with the highest incidence in men being in Qingdao, Shandong Province, at 108.7/100,000, and the lowest being in Chuzhou, Anhui Province, with a 32.9-fold difference between the two; and a 17.6-fold difference in mortality between the two.