"Code for Quality Management of Medical Device Business" Article IX provides that the purchase inspection records and sales records should be kept until 2 years after the expiration date of the medical device. No expiration date, not less than 5 years. Implantable medical devices purchase inspection records and sales records should be kept permanently.
So there is a product expiration date labeled single-use sterile medical device purchase and sales records and valid documents should be saved to the expiration of 2 years after the expiration date of the product.