China may try some “maneuvering” over the Taiwan issue ?when U.S. President Donald Trump visits Beijing next week, but the U.S. has reaffirmed its policy on the island has not changed, a top Taiwanese intelligence official said on Thursday.

China claims democratically governed Taiwan ?as its own territory and regularly describes it as ?the most ?sensitive and important issue in its relations with ?Washington. Taiwan’s government rejects Beijing’s sovereignty claims.

Taipei will be watching for any sign that Trump, who has unnerved partners with his ?transactional approach to alliances, could soften or reframe longstanding U.S. policy on ?Taiwan in return for China buying American aircraft or agricultural goods and easing economic pressures.