There can be no winners in a war between the U.S. and North Korea over Pyongyang's nuclear weapons and missile programs, Chinese Foreign Minister Wang Yi said, while pledging support for dialogue between the sides as tensions have recently been on the rise.

"We call upon all the parties, no matter verbally or in action, to stop provoking and threatening each other and not to allow the situation to become irretrievable and out of control," Wang said. 

"As long as dialogue takes place, it can be official or unofficial, through one channel or dual channels, bilateral or multilateral. China is willing to give support to all of them."

Wang's comments mark the latest attempt to cool things down by North Korea's most important ally and key provider of food and fuel aid. Any fighting on the Korean Peninsula is likely to draw in China, which has repeatedly expressed concerns about a wave of refugees and the possible presence of U.S. and South Korean troops on its border.

A day after Wang spoke, North Korea displayed what appeared to be new long-range and submarine-based missiles, on the 105th birth anniversary of its founding father, Kim Il-sung, as a nuclear-powered U.S. aircraft carrier group steamed toward the region.

Missiles appeared to be the main theme of the large parade on Saturday, with Kim's grandson, leader Kim Jong-un, taking time to greet the commander of the Strategic Forces, the branch of the military that oversees the missile arsenal.

North Korea Founder's Birthday

North Korea parades never-before-seen missiles across Kim Il Sung Square during a military parade on Saturday. (Wong Maye-E/Associated Press)

Kim did not speak during the annual parade, but a close aide warned that the North would stand up to any threat posed by the United States.

Choe Ryong Hae said U.S. President Donald Trump was guilty of "creating a war situation" on the Korean Peninsula by dispatching U.S. forces to the region.

'Our style of nuclear attack'

"We will respond to an all-out war with an all-out war and a nuclear war with our style of a nuclear attack," said Choe, widely seen by analysts as North Korea's No. 2 official.

Goose-stepping soldiers and marching bands filled the square, next to the Taedonggang River that flows through Pyongyang, in the hazy spring sunshine as tanks, multiple launch  rocket systems and other weapons waited to parade.

CBC's Saša Petricic was in Pyongyang, travelling with a government representative, as he watched the choreographed display of military might.

"You can feel the ground shake with every one of these platoons that go by. If you look to the other side (of the square), you can see rows and rows of senior officers who are clapping in unison," he said.

"This is meant to show a level of defiance from North Korea."

North Korea Founder's Birthday

Navy personnel sit in front of a submarine-launched ballistic missile (SLBM) during Saturday's military parade in Pyongyang, celebrating the 105th birth anniversary of Kim Il-sung, the country's late founder and grandfather of current ruler Kim Jong-un. (Wong Maye-E/Associated Press)

A series of what appeared to be KN-08 missiles were among the weapons rolled out on trucks. Analysts say the missiles could one day be capable of hitting targets as far as the continental United States, although North Korea has yet to flight test them.

The parade also included large rockets covered by canisters in two different types of transporter erector launcher trucks, or TELs, which can carry, move into launch position and fire missiles. An official from South Korea's Defense Ministry couldn't immediately confirm whether any of the rockets represented a new type of ICBM.

'Once a war really happens, the result will be nothing but multiple loss. No one can become a winner.' - Wang Yi, China's foreign minister

Kim Dong-yub, a North Korea expert at Seoul's Institute for Far Eastern Studies, said the canisters and trucks suggested that the North was developing technology to "cold launch" ICBMs, ejecting them from the canisters before they ignite. This would allow North Korea to launch its missiles without damaging its limited number of ICBM-capable launcher trucks and also make the missiles harder to detect after they're fired, he said. Cold launches would also allow the missiles to be fired from silos.

Kim, the analyst, said it's likely that North Korea is also developing solid-fuel ICBMs, and that some of the rockets inside the canisters on Saturday might have been prototypes. 

North Korea flexing its muscles

China has grown increasingly frustrated with the refusal of Kim Jong-un's regime to heed its admonitions, and in February cut off imports of North Korean coal that provided Pyongyang with a crucial source of foreign currency.

"China has to be willing to give a lot more harsher sticks. And the U.S., Japan and South Korea need to give a lot more sweeter carrots," Philip Yun, former senior adviser on North Korea under president Bill Clinton, told CBC News Network. "And then let things cool off to see if a deal can be made."

Wang last month urged North Korea to suspend its nuclear weapon and missile tests in exchange for South Korea and the U.S. putting their war games on hold, reviving a proposal first raised by Pyongyang. Washington swiftly dismissed the idea, but some observers have said administration officials may be becoming more amenable to renewed dialogue with the North.

North Korea Founder's Birthday

Women in uniform march across Kim Il-sung Square during the parade. (Wong Maye-E/Associated Press)

Earlier Friday, North Korea's Vice-Minister Han Song Ryol told The Associated Press in an exclusive interview that his country will keep building up its nuclear arsenal in "quality and quantity" and said Pyongyang is ready to go to war if that's what President Donald Trump wants.

Chinese experts said they see little immediate possibility of hostilities breaking out, but warned that Beijing will respond harshly to any further North Korean nuclear tests.

"I think the key North Korean objective has been achieved, which is their large military parade and propaganda and signaling of these very potent weapons and systems," John Park, director of the Korea Working Group think-tank in Seoul, told CBC News Network.

"There has been this analogy that North Korea is like a tin cup . It heats up very quickly and it cools down very quickly."

With files from CBC News and Reuters