China urges all sides to 'lower temperatures'

China yesterday called on all parties in the Korean standoff to stay calm and "stop irritating each other" a day after North Korea said the United States was pushing the region to the brink of nuclear war.

The United States has urged China, reclusive North Korea's lone major ally, to do more to rein in its neighbour's nuclear and missile programmes which have prompted an assertive response from the Trump administration, warning that the "era of strategic patience" is over.

The United States has sent a nuclear-powered aircraft carrier to Korean waters and a pair of strategic US bombers flew training drills with the South Korean and Japanese air forces in another show of strength this week.

Chinese Foreign Ministry spokesman Geng Shuang, asked about the bomber flights, the drills and North Korea's response, stressed that the situation was "highly complex" and sensitive.

"The urgent task is to lower temperatures and resume talks," he told reporters.

"We again urge all relevant parties to remain calm and exercise restraint, stop irritating each other, work hard to create an atmosphere for contact and dialogue between all sides, and seek a return to the correct path of dialogue and negotiation as soon as possible."

The flight of the two bombers came as US President Donald Trump raised eyebrows when he said he would be "honoured" to meet North Korean leader Kim Jong Un in the right circumstances, and as his CIA director landed in South Korea for talks.

North Korea said the bombers conducted "a nuclear bomb dropping drill against major objects" in its territory at a time when Trump and "other US warmongers are crying out for making a preemptive nuclear strike" on the North.