China's ambassador to the United States says Beijing would never accept North Korea as a nuclear weapons state.
North Korea said Saturday it was seeking military "equilibrium" with the United States as leader Kim Jong-Un vowed to complete Pyongyang's nuclear programme, which he said had "nearly reached the terminal".
North Korea successfully fired a Hwasong-12 intermediate-range ballistic missile over Japan on Friday, responding to a new round of UN sanctions over its sixth nuclear test with its furthest-ever missile flight.
"Our final goal is to establish the equilibrium of real force with the US and make the US rulers dare not talk about military option for the DPRK," leader Kim said, according to a report carried by the official KCNA news agency.
Kim said the country was close to the goal of completing its nuclear ambitions and should use all power at its disposal to finish the task, saying it had "nearly reached the terminal", the official KCNA news agency reported.
Kim said Friday's launch, which it described as a drill rather than a test, had increased the North's "combat power of the nuclear force", KCNA reported.
"We should clearly show the big power chauvinists how our state attain the goal of completing its nuclear force despite their limitless sanctions and blockade," Kim said, according to KCNA.
The UN Security Council condemned Friday's launch as "highly provocative" and US President Donald Trump scheduled talks with the leaders of Japan and South Korea to address the crisis.
"As Kim Jong-Un's most recent launch demonstrates, this is one of the world's most urgent and dangerous security problems," US National Security Advisor H.R McMaster said.
The US Pacific Command confirmed Friday's rocket was an intermediate range ballistic missile (IRBM) and said it did not pose a threat to North America or to the US Pacific territory of Guam, which Pyongyang has threatened with "enveloping fire".
Seoul's defence ministry said it probably travelled around 3,700 kilometres (2,300 miles) and reached a maximum altitude of 770 kilometres.
Yang Uk, an analyst with the Korea Defence and Security Forum, told AFP that Kim's stated ambition of achieving a military balance was some way off.
"It's too unrealistic for North Korea to reach equilibrium in nuclear force with the US even if it's true that the North has been making a rapid progress in its nuclear drive," he said.
The North has raised global tensions with its rapid progress in weapons technology under Kim, who is regularly pictured by state media overseeing launches and visiting facilities.
"The latest launch, which was apparently made from a TEL (transporter erector launcher or missile vehicle) instead of a makeshift launch pad, means the North is now ready to deploy the IRBM Hwasong-12 for combat purposes," he said.
The North's previous missile launch, a Hwasong-12 IRBM just over two weeks ago, also overflew Japan's main islands and was the first to do so for years.
"Within three to five years, the North is expected to be capable of operating nuclear missiles as deterrence," Yang Uk added.
Calls for talks
Russian President Vladimir Putin and his French counterpart Emmanuel Macron jointly appealed for talks with North Korea, saying this was the only way to resolve tensions over its nuclear programme.
The crisis requires resolution "exclusively through political and diplomatic means, by restarting direct negotiations", a Kremlin statement said following a phone call between the leaders.
The appeal was directed at the United States and Japan, countries calling to ramp up pressure through sanctions rather than pin hopes on talks.
Beijing has also urged Washington to do more to rein in North Korea.
"Honestly, I think the United States should be doing .. much more than now, so that there's real effective international cooperation on this issue," China's ambassador to the United States, Cui Tiankai, said on Friday.
"They should refrain from issuing more threats. They should do more to find effective ways to resume dialogue and negotiation," he said, while adding that China would never accept North Korea as a nuclear weapons state.
Russia and China, North Korea's main ally, on Monday backed a US-drafted resolution at the Security Council to impose fresh sanctions on Pyongyang - but they maintain dialogue is key to defuse the crisis.
Washington has rejected as "insulting" a proposal from China to kick-start talks with a freeze on North Korea's nuclear and missile tests in exchange for a suspension of US-South Korean drills.
The sanctions imposed on Monday banned the North's textile trade, stopped new work permits for its labourers, and imposed restrictions on shipments of oil products, among other measures.
Japanese Prime Minister Shinzo Abe said Tokyo could "never tolerate" what he called a "dangerous provocative action that threatens world peace".
In response to Friday's launch, South Korea's military immediately carried out a ballistic missile drill of its own, with the defence ministry saying it took place while the North's rocket was still airborne.
President Moon Jae-In told an emergency meeting of Seoul's national security council that dialogue with the North was "impossible in a situation like this".