The article doesn't provide enough information to make this leap of logic, saying only:
"The talks went well," Kyodo News agency quoted North Korean Vice Foreign Minister Kim Kye Gwan as saying at Pyongyang's airport on his return from the Beijing session.
"We are ready to implement the results of the meeting," he said at the airport to both Russia's ambassador to Pyongyang and a senior Chinese Embassy official, according to Kyodo.
"Ready to implement the results of the meeting" only means "ready to disarm" if the North Koreans admit that this is what the agreement requires them to do.
Does the agreement do this? And do we and the North Koreans agree on this interpretation.