SEOUL: North Korea’s ruling party has elevated leader Kim Jong Un’s powerful younger sister to a top position, state media said Tuesday, a sign of her far-reaching influence within the reclusive nation. Thousands of party elites have packed the capital Pyongyang for a once-in-five-years summit of the ruling Workers’ Party, a gathering that directs state efforts on everything from diplomacy to war planning. Kim Yo Jong — long considered one of her brother’s closest lieutenants — was promoted to department director within the party’s apex central committee, the Korean Central News Agency said.