(Yicai Global) July 24 -- China will build three major international aviation hubs in Beijing, Shanghai and Guangzhou, said Feng Zhenglin, director of the Civil Aviation Administration of China. The country plans to promote three airport groups in these first-tier cities to establish a route network coordinating mechanism to guide the diversified development of the air transport market. An improved air-land and air-sea multimodal transport policy will organically link various transport modes and realize comprehensive traffic efficiency.