From July 29 to August 2, Deputy Administrator of CAAC Lyu Erxue was invited to visit Hong Kong and Macao with a delegation to carry out in-depth study on promoting the building of Guangdong-Hong Kong-Macao Greater Bay Area, as well as further strengthening civil aviation exchanges and cooperation among China’s Mainland, Hong Kong and Macao. Lyu witnessed the signing of the Tripartite Agreement on Coordinated Airspace Development of Guangdong-Hong Kong-Macao Greater Bay Area, the Arrangement for Strengthening Coordinated Aviation Security among China’s Mainland, Hong Kong and Macao, and other cooperation agreements of civil aviation training between Civil Aviation Management Institute of China, International Cooperation and Service Center of CAAC, and Airport Authority Hong Kong. Lyu also presented the 12th Aviation Law Seminar between China’s Mainland, Hong Kong and Macao. During his stay, Lyu Erxue met with Carrie Lam, Chief Executive of Hong Kong SAR, and Chui Sai On, Chief Executive of Macao SAR separately, and they exchanged ideas on promoting the coordinated development of civil aviation in Guangdong-Hong Kong-Macau Greater Bay Area.