After the implantation of coronary stents, the following questions should be paid attention to: 1. Is the site of the implanted stent patent? 2. Are there any new lesions in other coronary vessels? Is there any progression of other existing coronary lesions?3. Is there any atherosclerosis or stenosis in other important organ vessels? Are the controllable factors that are known to cause vascular sclerosis under control? Such as hypertension, diabetes mellitus, hyperlipidemia, smoking, obesity, etc. Yao Yucai, Department of Cardiology, Shandong Qianfo Mountain Hospital, Shandong Province, China 5. Has the poor lifestyle been changed?