A second airport has become an eagerly sought feature for several of China’s largest cities, reflecting a broader shift towards airspace competition and multi-centre aviation networks.With dual-airport systems already in place in Beijing, Shanghai and Chengdu, new projects in Hangzhou, Guangzhou and Chongqing are advancing even as concerns mount over long-term fiscal viability and regional traffic shifts.Second airports are being framed by local governments not only as capacity-expansion...