The nation's civil aviation authority said on Thursday it would take measures to handle the possible delay and cancellation of flights caused by bad weather or military drills.

The Civil Aviation Administration of China said factors including stormy weather and "routine military exercises" are expected to affect flights to and from regions such as Shanghai, Nanjing, Wuhan, Zhengzhou and Qingdao in the coming weeks.

Some of these regions' air service will be delayed or even cancelled.

The administration will open temporary routes and help airlines reroute their flights during this period, it said, while urging carriers to reduce flights to and from these regions to avoid air congestion.

zhaolei@chinadaily.com.cn