South Korea on Thursday urged North Korea to return to nuclear disarmament talks and called on China to step up efforts to bring Pyongyang back to the table. Foreign Minister Yu Myung-Hwan Foreign Minister told Yonhap news agency that, now is the time for North Korea and China to respond more actively to calls for resuming the talks. <br/><br/>He said North Korea's demand that a peace system should be discussed first runs against the 2005 joint statement. In the 2005 statement, North Korea promised to dismantle its nuclear programmes in return for economic aid and diplomatic relations. Yu dismissed the North's persistent call for a peace treaty with the United States as a stalling tactic. North Korea abandoned the nuclear disarmament talks in protest at the international censure over its launch of a long-range rocket.