beijing u.s. president-elect donald trump call taiwan president tsai ing-wen petty action taiwan chinese foreign minister wang yi say saturday hong kong-based phoenix television report conversation first contact taiwan u.s. president-elect president since president jimmy carter switch diplomatic recognition taiwan china 1979 acknowledge taiwan part one china taiwan side engage petty action change one china structure already form international community wang say academic forum station say believe change longstanding one china policy unite state government one china principle cornerstone healthy development sino-u.s. tie hope political basis interfere damage way defeat nationalist force flee taiwan end civil war communists 1949 beijing never renounce use force bring control china view wayward province taiwan one china sensitive policy issue china generally lambast form official contact foreign governments taiwan leaders china deeply suspicious tsai election january believe want push island formal independence red line beijing tsai say want maintain status quo china want peaceful relations china label trump call 'petty action taiwan phoenix tv