What is the pillar industry of North Korea?

At present, North Korea implements a planned economic system, and under the guidance of "military politics first", it pursues the economic line of giving priority to the development of national defense industry while developing light industry and agriculture. Since July 2002, North Korea has successively implemented a series of measures to improve economic management, successively adjusted wages, prices and exchange rates, granted enterprises more independent management rights, and established Kaesong Industrial Zone and Mount Kumgang Tourist Zone. These measures have played a positive role in economic recovery and development, and maintained the recovery growth of the Korean economy in recent years. The main ports are Jinqing, Nanpu, Yuanshan and Nanxing. It mainly exports steel, non-ferrous metals, ginseng, textiles and aquatic products. Imported products mainly include petroleum, machinery and equipment, electronic products and textile products. The main trade targets are China, South Korea, Russian, Southeast Asian countries and so on.