Coronary artery disease (CAD) is caused by myocardial ischemia, hypoxia or necrosis due to coronary artery stenosis, spasm or obstruction. Although standard drug therapy can greatly improve the prognosis of patients with CAD after percutaneous coronary interventions (PCI), these patients are still at high risk of major adverse cardiovascular and cerebrovascular events (MACCE). At present, the concept of residual inflammation risk (RIR) has aroused widespread concern. RIR is an important independent risk in patients with CAD. Previous studies indicated that hsCRP ≥ 2mg / L was the definition standard of RIR in CAD in European and American people. In China, the impact of dynamic changes of hsCRP and other inflammatory factors on MACCE in PCI population remains unclear. Therefore, in this study, the investigators plan to recruit patients undergoing PCI, and observe the impact of hsCRP and other inflammatory factors on the prognosis of these patients during long term follow-up at 17 hospitals in China.