4. Clinical follow-up time points: 1 months, 6 months, 12 months and 18 months of a year and 2 years to 5 years follow-up; This test by an independent coronary angiography core laboratories, data management and statistical center, clinical end points to judge committee and clinical monitoring of all relevant clinical and imaging data collecting, sorting, statistical analysis and judgement.All the selected patients within five years continuous follow-up tracking (phone or outpatient follow-up), to observe the happening of adverse events to the forward of the second generation of EXCEL drug-eluting stents (des) system security to make more accurate and credible evaluation.