beijing/taipei china accuse unite state thursday interfere internal affairs say lodge complaint u.s. president donald trump sign law act lay groundwork possible u.s. navy visit self-ruled taiwan tensions rise recent days senior chinese diplomat threaten china would invade taiwan u.s. warships make port visit island china claim territory monday chinese jet carry island encirclement patrol around taiwan state media show picture bombers cruise missiles sling wing carry exercise tuesday trump sign law national defense authorization act 2018 fiscal year authorize possibility mutual visit navy vessels taiwan unite state visit would first since unite state end formal diplomatic relations taiwan 1979 establish tie beijing chinese foreign ministry spokesman lu kang say taiwan section law legally bind seriously violate one china policy constitute interference china internal affairs china resolutely oppose already lodge stern representations u.s. government lu tell daily news brief china firmly oppose official exchange military contact arm sales taiwan unite state add proudly democratic taiwan become increasingly concern ramp chinese military presence include several round chinese air force drill around island recent months taiwan confident defenses respond quickly chinese air force drill week government say denounce rise china military deployments irresponsible taiwan presidential spokesman alex huang speak taiwan media comment report late wednesday say defense ministry keep close watch patrol respond immediately properly taiwan ensure concern national security people rest assure huang say side narrow taiwan strait separate taiwan giant neighbor responsibility protect peace stability add raise military posture may impact upon harm regional peace stability cross-strait tie give feel responsibility international community look favorably upon huang quote say relations sour considerably since tsai ing-wen lead taiwan independence-leaning democratic progressive party presidential elections last year china suspect tsai want declare island formal independence red line beijing tsai say want maintain peace china defend taiwan security taiwan well equip mostly u.s. weapons press advance equipment deal see rise threat china unite state bind law provide island mean defend china never renounce use force bring taiwan control china anger u.s. consider navy visit taiwan