Chinese J-11 fighter jets prepare to take off for a large-scale air combat drill involving more than 100 pilots in China's northwestern desert area, from Nov 19 to 30. The drill was focused on the rivalry between J-10 and J-11 fighters and became the biggest exercise of the air force in recent years.[Photo/Xinhua]

A large-scale air combat drill involving more than 100 pilots in China's northwestern desert area took place from Nov 19 to 30. [Photo/Xinhua]