seoul/washington north korea display trademark defiance wednesday new unite nations sanction impose sixth largest-ever nuclear test vow redouble efforts fight say threat u.s. invasion u.s. president donald trump say sanction unanimously agree monday 15-member u.n. security council small step toward ultimately need rein pyongyang nuclear missile program north korea foreign ministry say resolutions infringement legitimate right self-defense aim completely suffocate state people full-scale economic blockade dprk redouble efforts increase strength safeguard country sovereignty right existence preserve peace security region establish practical equilibrium u.s. say statement carry official kcna news agency democratic people republic korea dprk north korea official name statement echo comment tuesday dprk ambassador unite nations geneva han tae song say pyongyang ready use form ultimate mean forthcoming measure ... make u.s. suffer great pain ever experience history han say north rodong sinmun newspaper also accuse south korea washington puppet criticize seoul agreement unite state amend exist bilateral guideline allow south use unlimited warhead payloads missiles u.n. security council agree tighten sanction north korea ban textile export cap fuel supply make illegal foreign firm form commercial joint venture north korean entities u.n. resolution trigger north korea test say hydrogen bomb damage mountainous terrain north nuclear test site punggye-ri see satellite imagery take late test extensive anything see five previous test say 38 north washington-based project monitor north korea also activity another location mount mantap site involve large vehicles mine equipment suggest onsite work could change focus prepare portals future underground nuclear test 38 north say north accuse unite state 28,500 troop south korea legacy 1950-53 korean war continual plan invasion north korea also test missile capable reach unite state experts say likely least year field operational nuclear missile could threaten u.s. mainland u.s. official speak condition anonymity say intelligence agencies observe north korea move mobile missile launcher past 48 hours could potentially indicate possible missile launch north come days official comment location type missile emphasize launch possible north korea could simply move launcher trump vow allow happen tough initial u.s. draft resolution weaken win support china russia hold veto power u.n. security council significantly stop short impose full embargo oil export north korea come china think another small step big deal trump tell reporters start tuesday meet malaysian prime minister najib razak know impact certainly nice get 15-to-nothing vote sanction nothing compare ultimately happen u.s. treasury secretary steven mnuchin also warn china north korea main ally trade partner washington would put additional sanction prevent access u.s. international dollar system follow new measure another senior administration official tell reuters secondary sanction chinese bank company hold give beijing time show prepare fully enforce late previous round sanction washington far mostly hold new sanction chinese bank company business north korea give fear retaliation beijing possibly far-reaching effect world economy russia china say respect u.n. sanction call unite state return negotiations north korea also say could kick-start talk north korea unite state halt joint military drill south korea washington reject article carry front page people daily official paper china rule communist party say korean peninsula reach moment choice unite state north korea must break cycle nuclear test sanction party involve peninsula strategic considerations able see beyond vicious cycle anyone interest article say ask north korean u.s. rhetoric china foreign ministry reiterate call restraint return dialogue hope relevant party rational maintain restraint take action could increase tensions peninsula ministry spokesman geng shuang say regular brief another show force south korea air force conduct first live-fire exercise taurus long-range air-to-surface missiles tuesday defence ministry say practice precision bomb north korean facilities u.s. ambassador unite nations nikki haley say new sanction could eventually starve north korea additional 500 million annual revenue unite state say previous round sanction agree august aim cut north korea billion export third north korea defiant u.n. sanction trump say tough step need