beijing/taipei china warn self-ruled taiwan wednesday would reap consequences promote formal independence red line beijing claim island taiwan government hit back say reality republic china island formal name sovereign country matter china say could change fact taiwan one china sensitive issue beijing never renounce use force bring consider wayward province rule defeat nationalist force flee taiwan 1949 end chinese civil war taiwan japanese colony 1895 1945. speak parliament tuesday newly appoint taiwan premier william lai say political worker advocate taiwan independence already independent country call republic china need declare independence xiaoguang spokesman china taiwan affairs office say reaction relations across taiwan strait separate country country relations one china one taiwan taiwan inseparable part chinese territory never country never become country say mainland side resolutely oppose form taiwan independence word action never allow historical tragedy national separation repeat consequences reap engage taiwan independence separatism add without elaborate taiwan mainland affairs council say matter beijing say objective reality republic china sovereign state taiwan future development relations across strait jointly decide taiwan 23 million people say taiwanese officials say previously need declare independence republic china already independent country though territory cover taiwan offshore islands close china south china sea relations taipei beijing nosedive since tsai ing-wen pro-independence democratic progressive party election last year china suspect want independence say want maintain peace china beijing suspend regular dialogue mechanism taipei establish previous china-friendly government taiwan dramatic reduction number chinese tourists visit taiwan china say taiwan country taiwan say china need reality check