beijing chinese academics publicly broach idea china unite state share plan deal potential conflict korean peninsula sign say north korea weapons test may make beijing open taboo subject chinese officials rebuff top u.s. military brass years efforts share contingencies war regime collapse pyongyang suspicious washington intentions fearful engagement could alienate north korea steadfast wartime ally jia qingguo dean school international study china elite peking university respect advisor chinese leaders say article week chance war increase daily might time china prepare bad war become real possibility china must prepare mind china must will consider talk concern countries contingency plan jia write article first publish online east asia forum run australian national university give recent developments beijing may good choice start talk washington seoul jia say tie china north korea deteriorate sharply recent years point diplomats experts fear beijing may become like washington target neighbor ire jia comment forefront still sensitive debate china make north korea friday fire missile fly japan northern hokkaido far pacific ocean test come u.n. security council late round sanction monday ban north korea textile export cap fuel supply response pyongyang accelerate effort target unite state powerful nuclear-tipped missile xie tao associate dean school english international study beijing foreign study university say chinese academics years past would typically express opinions whether china share plan washington behind close doors get sort people leave right allow make view public xie tell reuters could interpret signal chinese government perhaps will consider actually join contingency plan xie say sense must in-depth discussion could potentially happen collapse internal chaos beijing washington respond trip china august joseph dunford chairman u.s. joint chiefs staff attend chinese military drill china northern theater command city shenyang cover china border north korea analysts perceive china open crack door preparations neither side show card public dunford say beijing visit despite washington urge condition set detail conversation two militaries u.s. military officials privately voice frustration previous channel establish direct military communications line essentially unstaffed chinese side dunford say create round-the-clock responsive communications link could use crisis top priority military tie graphic north korea 's missile nuclear test click chinese academics prod beijing consider north korea contingencies