China has praised the leaders of the two Koreas for holding a landmark summit, calling their handshake over the Military Demarcation Line that divides the peninsula a "historic moment".
"We applaud the Korean leaders' historic step and appreciate their political decisions and courage," foreign ministry spokeswoman Hua Chunying told a regular press briefing.
Other world leaders have also commented on the summit, including Australian Prime Minister Malcolm Turnbull who cautiously welcomed the talks.
"We have had false dawns before on the Korean peninsula," he told reporters in Perth.
He said he has no plans to visit Korea in the foreseeable future but is closely monitoring developments.
The North Korean nuclear threat was a top issue of discussion during the prime minister's recent meetings with various European leaders.
Foreign Minister Julie Bishop hopes North Korea will demonstrate verifiable steps to denuclearisation.
"I think we should maintain our expectations," she told reporters in Sydney. "This is a first step, a preliminary step."
Ms Bishop was assured by her South Korean counterpart that Australia will receive a briefing on the meeting next week.
Meanwhile, the UK's Foreign office said in a statement on Saturday: "A long-term commitment from Kim Jong-un to halt all nuclear tests and ICBM launches would be a positive step. We hope this indicates an effort to negotiate in good faith.
"We remain committed to working with our international partners to bring about our goal of a complete, verifiable and irreversible denuclearisation of the Korean peninsula, and to do so through peaceful means."
US President Donald Trump said the move marked "big progress".
"North Korea has agreed to suspend all Nuclear Tests and close up a major test site," he tweeted.
"This is very good news for North Korea and the World - big progress! Look forward to our summit."
The Russian Foreign Ministry welcomed an announcement by North Korea that it will halt nuclear and missile tests. It also called on the US and South Korea to reduce their military activity in the region.
German Foreign Minister Heiko Maas said North Korea's announcement that it would immediately suspend nuclear and missile tests was a step in the right direction but added that Pyongyang must reveal its nuclear and missile programme.
"To enter into a serious political process working towards the complete denuclearisation of North Korea, it is however necessary for Pyongyang to follow specific steps and to disclose its complete nuclear and missile programme in a verifiable way," Maas said on Saturday.
Federica Mogherini, the high representative of the EU for foreign affairs and security policy, said the announcement was "a positive, long sought-after step on the path that has now to lead to the country's complete, verifiable and irreversible denuclearisation."
It was also a move towards "the full respect for its international obligations and all relevant UN Security Council resolutions."
