China says it is seriously concerned about North Korean nucleardevelopment, in the wake of a BBC interview with a top official from the North.
North Korea's vice-foreign minister told the BBC Pyongyang would continue to test missiles and would launch a pre-emptive nuclear strike if it thought the US was planning an attack.
Foreign ministry spokesman Lu Kang said China opposed words or actions that could further raise tension.
North Korea-US tension is growing.
There has been heated rhetoric from both sides in recent days. US Vice-President Mike Pence, who has been visiting the region, warned the North not to test Washington and said the US "era of strategic patience" with Pyongyang was over.
The BBC's Stephen McDonell in Beijing says the Chinese government appears to be becoming increasingly frustrated with North Korea, its traditional ally.
Source BBC News.