Pyongyang, North Korea (CNN) In a three-hour speech broadcast on North Korean TV Sunday, Supreme Leader Kim Jong Un set a five-year plan to revive his country's struggling economy. But the speech included no major policy changes or economic reforms.

Kim delivered the speech during the 7th Congress of the Workers Party of Korea, the highest-level political gathering in the isolated, one-party state. More than 3,400 party members are in Pyongyang for the congress that began Friday and continued through the weekend

An end date hasn't been announced for the gathering, the first party congress in 36 years.

Kim's economic plan, the first of its kind in decades, was short on specifics. The leader, who has been in power since his father's death in late 2011, called for a greater focus on factory automation, mechanizing agriculture, and increasing coal output.

He also called for greater exports of raw materials, but did not address how that would be possible in the wake of heightened U.N. sanctions after this year's purported hydrogen bomb and missile tests.

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