A North Korean "friendship" group led by a high-ranking ruling party official in charge of economic policy is visiting China, state-run media reported Tuesday, around a month ahead of Pyongyang's summit with the United States.At Beijing International Airport, the delegation headed by Pak Tae Song, vice chairman of the Workers' Party, was greeted by an official of China's ruling Communist Party and North Korea's ambassador to China, the Korean Central News Agency said.KCNA did not report details of the group's activities, but high-ranking officials from Beijing and Pyongyang are believed to …READ FULL ARTICLE