Seoul says it shut the Kaesong complex in response to the North's recent long-range rocket launch to keep its impoverished neighbor from using the money factories provided to fund its nuclear and missile programs. With that hit to Pyongyang's already shaky finances gone, at least for now, here's a look at the North's economy and the external sources of income it maintains despite a raft of heavy international sanctions over its nuclear and ballistic missiles program. North Korea's main exports to China include coal, minerals, clothing and textile, and foodstuff, while its imports from China include petroleum gas, steel, machinery, cars and electronics products, according to South Korea's government-funded Korea Trade-Investment Promotion Agency. Beijing, however, is unlikely to support harsh punishment over the nuclear test and rocket launch for fear of provoking a government collapse in Pyongyang and a potential stream of refugees across their border. While the South Korean companies pay the North in U.S.