TAIPEI, Nov 28 (Reuters) - Taiwan’s air force scrambled again on Sunday to warn away 27 Chinese aircraft that entered its air defence zone, Taiwan’s defence ministry said, the latest increase in tensions across the Taiwan Strait as China’s president met his top generals.

Chinese-claimed Taiwan has complained for a year or more of repeated missions by China’s air force near the democratically governed island, often in the southwestern part of its air defence identification zone, or ADIZ, close to the Taiwan-controlled Pratas Islands.

Taiwan calls China’s repeated nearby military activities “grey zone” warfare, designed to both wear out Taiwan’s forces by making them repeatedly scramble, and also to test Taiwan’s responses.

The latest Chinese mission included 18 fighters jets plus five nuclear-capable H-6 bombers, as well as, unusually, a Y-20 aerial refuelling aircraft, the Taiwan ministry said.