Digital infrastructure is an important force supporting economic and social development. In 2018，countries around the world continue to vigorously promote digital infrastructure construction. The coverage of fixed broadband and mobile broadband in countries continues to rise steadily，and is popularized in less developed countries，remote areas and low-income people. The broadband network speed-up and fee-reduction work continues to deepen. 5G technology has entered a critical stage of commercial deployment，and competitions for the development and popularization of 5G networks in various countries have intensified，and technology research and related standards have been steadily developed. IPv6 continues to evolve and upgrade，and has entered the high speed development phase.