The main body of the Class C vault door is fabricated from high-quality carbon steel or stainless steel plates and is equipped with a daylight shutter. It complies with the General Technical Requirements for Vault Doors GB 37481-2019 and the Bank Security Prevention Standards GA 38-2021, featuring an aesthetically pleasing appearance, robust construction, and smooth operation. The door offers fire resistance, drill resistance, impact resistance, and flame-cutting resistance. It is fitted with three UL-certified, originally imported sand-gold combination locks and one fingerprint reader; additional lock options—including electronic combination locks, time locks, and vault-specific locks—as well as biometric access control systems such as palm-vein recognition, fingerprint recognition, finger-vein recognition, facial recognition, and iris recognition, can be configured according to customer requirements. An intelligent control system is also available, with pre-installed interfaces for remote networking and alarm devices. Optional accessories include automatic scrambling devices, multi-lock interlocking mechanisms, secondary doors, relocking devices, and waterproofing systems. The secondary door is installed below the main door and provides protection equivalent to that of the main door. Upon request, the vault door can be fully automated for opening and closing.