By Sarah Wu and Yimou Lee TAIPEI (Reuters) – Taiwan’s foreign minister said on Tuesday that China was using the military drills it launched in protest against U.S. House Speaker Nancy Pelosi’s visit as a game-plan to prepare for an invasion of the self-ruled island. Joseph Wu, who offered no time-table for a possible invasion of Taiwan, which is claimed by China as its own, said Taiwan would not be intimidated even as the drills continued with China often breaching the unofficial median line down the Taiwan Strait. “China has used the drills in its military play-book to prepare for...