beijing december refiled change headline clarify amcham american chamber commerce china say saturday incoming u.s. administration still formulate position need get speed quickly historical tensions donald trump speak taiwan president tsai ing-wen president-elect yet take office still formulate position wide range issue place much emphasis particular action comment process say statement trump-tsai call chamber long support maintain stability region expect new administration respect status quo american business operate asia need certainty stability new administration need get speed quickly historical tensions complex dynamics region amcham china say new u.s. administration need get speed quickly