SHANGHAI (AFP) - China's civil aviation authority has confirmed military exercises are behind widespread flight delays and cancellations this month, following days of rumours.
The Civil Aviation Administration of China (CAAC) said in a statement that "routine" military drills had impacted flights in the latter part of July, though it also cited weather and unspecified other reasons.
Cities affected included Shanghai, Nanjing and Qingdao in the east, and Wuhan and Zhengzhou in central China, the statement said.
Hundreds of flights were delayed at Shanghai's two airports, Pudong and Hongqiao, this week, according to local media, with around 170 delayed on Thursday alone according to the Shanghai Daily newspaper.
China's military controls much of the country's airspace - some estimates say as little as 20 per cent is reserved for civil flights. Industry officials say that results in longer flight times, less efficient routes and unaccountable delays.
China's capital Beijing was the worst city in the world for delays last year with only 18 per cent of flights on time, followed immediately by Shanghai, according to the website www.flightstats.com.