South Korean President Park Geun-hye met with a former top Chinese diplomat Friday as she prepares for her first summit with Chinese President Xi Jinping, where she plans to use to enlist Beijing\'s help in pressuring North Korea to give up its nuclear programs. The meeting with Xi, set for June 27, comes after the new Chinese president and U.S. President Barack Obama agreed at a summit earlier this month that Pyongyang has to abandon its nuclear weapons aspirations, the latest indication that Beijing may be toughening its stance on the communist neighbor.