<qa>  What is the primary study endpoint of NACCE?This study will recruit 2,446 subjects with stable coronary artery disease in no more than 40 research centers in China. All participants met the inclusion criteria will be 1:1 randomized to 3 months or 12 month of DAPT after implanting FirehawkTM coronary stent.Clinical follow-up will be carried out at 30 days, 3 months, 6 months, 12 months, 18 months, 2 years and 3 years after index procedure.The primary study endpoint is Net Adverse Clinical and Cerebral Events NACCE, a composite of all-cause death, myocardial infarction MI, cerebral vascular accident CVA and major bleeding academic research consortium ARC definition and GUSTO definition at 18 months. Subjects that complete of 18 months follow-up will be regarded as having completed the primary endpoint. The secondary study endpoints contain ARC defined stent thrombosis ST at all study time-points; NACCE at 30 days,6,12,24 and 36 months of follow-up;major adverse cardiovascular events MACE,major adverse cardiovascular and cerebral events MACCE,target lesion revascularization TLR,target lesion failureTLF,ST at 30 days,6,12 ,18,24 and 36 months of follow-up; major bleeding at 1, 3, 6, 12 ,18,24 and 36 months of follow up; as well as cost-effective at 18 months of follow-up. 