seoul president donald trump wrap visit seoul wednesday major speech north korea shift focus china expect press reluctant president xi jinping tighten screw pyongyang u.s. officials say trump address south korea national assembly come day seem take balance approach threaten use america full military might north korea need also offer diplomatic open make deal end nuclear standoff trump present specific solution tough global security challenge conciliatory rhetoric toward north korea could help low tensions washington pyongyang put much east asian region edge prospect military conflict contrast markedly trump early threats totally destroy north korea threaten unite state personal insult exchange north korean leader kim jong un remain see however whether unpredictable trump final day north korea doorstep build approach return bellicose language characterize handle north korean issue trump official talk point asia tour show intend use speech part contrast south korea amaze rise north korea sad backward state urge resolve pyongyang accord confidential document review reuters also expect condemn pyongyang poor human right record trump fly beijing accord senior administration officials try convince xi squeeze north korea step limit oil export coal import financial transactions preview beijing visit trump tell news conference seoul tuesday china north korea giant neighbor russia among countries whose cooperation crucial get north korea rein nuclear missile program president xi helpful find helpful soon trump say far clear xi consolidate power communist party congress agree china say leverage pyongyang exaggerate west point support u.n. security council recent sanction north korea evidence curtail isolate nation nuclear missile test issue china position stance already clear staunch chinese foreign ministry spokeswoman hua chunying say monday everyone see clearly need anybody tell us do trump appear crack open door diplomacy north korea something china long urge may good chance secure promise intensify economic pressure north korea rely beijing 90 percent trade north korean leader kim jong un however seem will risk snub china deem useful pursue development nuclear-tipped missile capable hit u.s. mainland time xi may mindful trump hold trade action china loudly threaten 2016 presidential campaign give beijing time make progress north korea part xi also look maintain good personal chemistry two leaders develop trump host mar-a-lago estate florida april bromance set continue xi return favor lay lavish welcome trump visit start wednesday trump expect go forbid city possibly guide xi participate inspection chinese troop though china release detail trump give major north korea speech press china