A method, telecommunication apparatus, and electronic device for securely creating an identity data block are disclosed. Tilt adjustment values spanning from the inner circumference to the outer circumference of an optical disc are stored. Furthermore, the sealing device has an annular reinforcement element having a strip-like section which coaxially surrounds the main body on the outer side thereof. In response to when a product quality issue arises using the decision rules when producing products according to the product raw material combinations helps to quickly determine the sources of unqualified product raw materials and improves product quality safety.