Expanding carriers seek more space over Chinese skies

China's skies do not have enough space. The country's air force controls airspace and allots only 20 per cent to civil aviation. With the mainland's three biggest airlines planning to add at least 273 planes in the next three years, traffic congestion that already delays 25 per cent of flights is set to worsen.

via Business feed http://www.scmp.com/business/article/1240177/airspace