Taiwan is on alert for China to carry out military exercises after the inauguration of President-elect Lai Ching-te this month, the island's top security official said on Wednesday, noting that Beijing usually begins such drills in June.

China, which views democratically governed Taiwan as its own territory, has a strong dislike of Lai, believing him a dangerous separatist. China's government has rejected his repeated offers of talks, including one made last week.

Lai, like current President Tsai Ing-wen, rejects Beijing's sovereignty claims; both say only the island's people can decide their future. Lai, now vice president, will be inaugurated on May 20.