beijing japan talk sanction north korea rather dialogue see go unite nations resolutions chinese foreign minister wang yi tell japanese counterpart tensions continue rise since north korea carry sixth nuclear test sept. prompt new round u.n. sanction wang tell japan foreign minister taro kono sideline unite nations meet new york situation korean peninsula get increasingly serious side need remain calm resume peace talk much part u.n. resolutions enforce sanction wang say accord statement issue china foreign ministry late friday japanese side talk sanction bring talk even go talk see contravene security council resolutions ministry cite wang say china hop japan talk act cautiously play constructive role nuclear issue say beijing repeatedly express concern rise tensions north korea sign increasingly tough u.n. sanction also urge return talk party exercise restraint friday russia urge hot head calm unite state admit felt challenge north korea warn could test hydrogen bomb pacific trump call north korean leader kim jong un madman friday day kim dub mentally derange u.s. dotard would face high level hard-line countermeasure history retaliation trump say u.s. would totally destroy north korea threaten unite state ally china tell japan abandon dialogue north korea