To standardize the number protection service, relevant authorities have initiated a pilot program, designating the 700 segment as a dedicated resource. This service efficiently mitigates information leakage by employing temporary "intermediate numbers" to substitute users' actual mobile phone numbers. It finds extensive application in sectors like express delivery and food delivery. The implementation of intermediate numbers does not impede normal communication. During calls, both parties see temporary numbers, while the backend system seamlessly translates the real numbers to establish the call connection.