 2. Chronic total occlusive lesion, severe left main coronary artery disease, orifice lesion, 3-vessel disease, bifurcation lesions with side branch diameter greater than 2 mm, orifice diameter stenosis greater than or equal to 50, or side branch need to be protected by guidewire or balloon, OCT imaging is not suitable for the lesion site or OCT imaging is incomplete, Target lesion located in previous venous or arterial bypass grafts, Target lesion has visible thrombus, intercurrent infection, or other inflammatory diseases.; 