BioFreedom stent is the world's first polymer-free drug-coated stent, which was developed by Biosensor Europe, a subsidiary of Lan Fan Medical. Adopting the exclusive patented selective microporous structure surface (SMS) uncoated technology, combined with the highly lipophilic patented drug BA9TM. Stents are especially suitable for patients with high bleeding risk, which can shorten the treatment cycle of dual antiplatelet (DAPT) from 6- 12 months to 1 month after stenting, and significantly improve the effectiveness and safety of percutaneous coronary intervention (PCI) in patients with high bleeding risk.