To implement the work deployed by the General Office of the CPC Central Committee and the General Office of the State Council on the quality-development of infrastructure and construction of new infrastructure, CAAC issued the Implementation Opinions of CAAC on Promoting Quality Civil Aviation Development by New Infrastructure Construction (hereinafter referred to as the Implementation Opinions) and the Five-Year Action Plan of CAAC on Promoting New Infrastructure Construction (hereinafter referred to as the Five-Year Action Plan). The purposes of these documents were to actively promote the digital, intelligent and smart transformation and upgrading of the industry and boost quality development of civil aviation infrastructure.