 Complete the following phrase:  Ri served as a deputy director of the Organization and Guidance Department from 2007 to 2010, when he was appointed chief secretary of the North Pyongan Provincial Committee of the Workers Party of Korea and gained a seat in the partys Central Committee. He was transferred to Pyongyang in 2015 and promoted to party vice-chairman, Politburo member and director of the Munitions Department at the 