BEIJING/TAIPEI, March 29 (Reuters) - China threatened to retaliate on Wednesday if U.S. House Speaker Kevin McCarthy meets Taiwan President Tsai Ing-wen during her planned transit of the United States next month, saying any such move would be a "provocation". China, which claims democratically-ruled Taiwan as its own territory, has repeatedly warned U.S. officials not to meet Tsai, viewing it as support for the island's desire to be seen as a separate country. China staged war games around Taiwan last August when then-U.S. House Speaker Nancy Pelosi visited Taipei, and Taiwan's armed forces have said they are keeping watch for any Chinese moves when Tsai is abroad. While not officially confirmed, she is expected to meet McCarthy while in California, at the end of her trip. The United States says such transits by Taiwanese presidents are routine and that China should not use Tsai's trip to take any aggressive moves against Taiwan.

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