More than one third of lung cancers are due to active smoking or passive “secondhand smoke”; a U.S. study concluded that about 20% of lung cancer in non-smokers is attributable to environmental tobacco smoke; lung cancer mortality is 4-10 times higher among smokers than non-smokers, and the earlier the age of initiation, the longer the duration of smoking, and the older the smoker, the higher the lung cancer mortality rate The average of 10 cigarettes per day is associated with an 18% increase in cardiovascular disease mortality in men and a 31% increase in cardiovascular disease mortality in women; the risk of myocardial infarction increases 4-fold in younger smokers compared with older adults; 11.0% of acute coronary events and 11.0% of acute ischemic stroke events are attributable to smoking; the overall risk ratio for all types of stroke in Chinese men who are current smokers is 1.39. 1.39, mainly the increased risk of ischemic stroke with a risk ratio of 1.49; 1.4 million deaths from smoking-related diseases in China in 2007, causing direct and indirect national economic losses of nearly 300 billion yuan, accounting for about 1.5% of the gross national product; and