beijing taiwan important sensitive issue sino-u.s. tie chinese president xi jinping tell visit u.s. president donald trump thursday ahead one-year anniversary trump take precedent-breaking call taiwan president china consider democratic taiwan wayward province integral part territory ineligible state-to-state relations never renounce use force bring island control unite state formal tie taiwan bind law help defend island main source arm trump upset china last december take telephone call taiwan president tsai ing-wen shortly election first call u.s. taiwan leaders since president jimmy carter switch diplomatic recognition china taiwan 1979. public mention taiwan comment xi trump make front reporters official chinese foreign ministry statement talk mince word taiwan issue important sensitive core issue china-u.s. relations concern political basis china-u.s. relationship ministry paraphrase xi tell trump china hop u.s. side continue scrupulously abide one china principle prevent disturbances broad picture china-u.s. tie xi add trump tell xi unite state government uphold stick one china policy china official xinhua news agency report taipei chiu chui-cheng deputy minister taiwan china policy-making mainland affairs council say china respect taiwan people think china deeply understand respect taiwan people opinions growth relations across taiwan strait chiu tell reporters also will work side find new positive model cross-straits tie would use dialogue resolve differences create proper path harmonious relations china suspect tsai want push formal independence taiwan red line beijing tsai say want maintain peace china defend taiwan democracy security china pressure taiwan since tsai take office last year suspend regular dialogue mechanism slowly peel away remain diplomatic ally china deeply suspicious u.s. intentions toward taiwan upset unite state recently allow tsai transit hawaii guam way diplomatic ally taiwan pacific defeat nationalist force flee taiwan 1949 lose civil war communists taiwan important issue sino-u.s. tie china 's xi tell trump