Chinese President Xi Jinping and South Korean President Lee Jae-myung are set to hold a summit meeting on Saturday on the sidelines of the Asia-Pacific Economic Cooperation forum held in Gyeongju, South Korea.
Lee's office on Friday said Xi and Lee will discuss the denuclearisation of the Korean peninsula.
"The ROK is still unaware that struggling to deny the DPRK's position as a nuclear weapons state and talking about its daydream of realising the denuclearisation just reveal its lack of common sense," KCNA said, using the abbreviations for Republic of Korea, South Korea's official name, and Democratic People's Republic of Korea, North Korea's official name.
"We will show with patience that denuclearisation is a 'pipe dream' which can never be realised," KCNA said, citing a statement by Vice Foreign Minister Pak Myong Ho.
Meanwhile, US President Donald Trump reaffirmed that the US would resume nuclear testing, but he did not answer directly when asked whether that would include underground nuclear tests that were common during the Cold War.
"You'll find out very soon, but we're going to do some testing," Trump told reporters aboard Air Force One on Friday as he flew to Palm Beach, Florida, when asked about underground nuclear tests.
"Other countries do it. If they're (going) to do it, we're going to do it, OK?"
