BEIJING - North Korea should halt any plans for nuclear and missile activities "for its own security," a Chinese newspaper said on Wednesday, warning that the United States is making clear it doesn't plan to "co-exist" with a nuclear-armed Pyongyang.North Korean state media cautioned on Tuesday of a nuclear attack on the United States at any sign of American aggression, as a US Navy strike group steamed toward the western Pacific - a force US President Donald Trump described as an "armada."Trump, who has urged China to do more to rein in its impoverished ally and neighbor, said in a tweet that North Korea was "looking for trouble" and the United States would "solve the problem" with or without Beijing's help.The Korean Peninsula has not been so close to a "military clash" since North Korea conducted its first nuclear test in 2006, China's influential state-run tabloid the Global Times said in an editorial."Not only Washington brimming with confidence and arrogance following the missile attacks on Syria, but Trump is also willing to be regarded as a man who honors his promises," the paper, run by the ruling Communist Party's official People's Daily, said."The US is making up its mind to stop the North from conducting further nuclear tests. It doesn't plan to co-exist with a nuclear-armed Pyongyang," it said."Pyongyang should avoid making mistakes at this time."