Chinese President Xi Jinping and new South Korean President Moon Jae-in have discussed nuclear tensions, with the latter addressing the raft of problems posed by the North's defiance.
Xi told Moon China had always upheld the denuclearisation of the Korean peninsula and that the nuclear issue should be resolved through talks, which were in everyone's interests, according to a state television report.
China was willing to keep working hard with all parties, including South Korea, for the peace and prosperity of the Korean peninsula, he said.
Despite its anger at North Korea's repeated nuclear and missile tests, China remains the isolated state's most important economic and diplomatic backer even with Beijing signing up for tough UN sanctions against Pyongyang.
Beijing also has its own issues with Seoul. China has vigorously opposed the deployment of a US anti-missile system in South Korea, saying it threatens Chinese security and will do nothing to resolve tensions with North Korea.
Thursday's Chinese state television report made no direct mention of the anti-missile system, instead citing Xi as saying both sides should handle their disputes appropriately.
China also hopes the new South Korean government attaches importance to China's concerns and takes steps to promote the stable and healthy development of ties, Xi said.
Moon said in his first speech as president on Wednesday he would immediately begin efforts to defuse security fears on the Korean peninsula and would negotiate with Washington and Beijing to ease tensions over the deployment of the Terminal High Altitude Area Defense anti-missile system in the South.
He also said he was prepared to go to Pyongyang "if the conditions are right".
North Korea is believed to be preparing for a sixth nuclear test and is working to develop a nuclear-tipped missile capable of reaching the United States, presenting President Donald Trump with perhaps his most pressing security issue.
