one:Gender not limited at the age of 18 to 80 two:myocardial ischemia or angina symptoms of coronary artery disease three:A narrow is less than 50% treated with stents four:Comply with the instructions five:Voluntarily signed the informed consent form exclusion criteria: one:Pregnant women two:cardiac shock three:Against a suppository medicines or allergies four:Participated in other test research in the first 6 months five:Within 6 months after PCI plans to accept non cardiac surgery six:Non-compliant patient Follow-up time:A month for 6 months and 9 months to 1 year to 2 years follow-up progress plan:All center within 6 months after start of complete into the group