sentences:  The most recent high-level visit occurred in July 2007, when Kim Yong-nam, Chairman of the Presidium of the Supreme People's Assembly, made his third visit to the country; he had previously made two trips to Mongolia, in 1985 and 1988.Unofficially, North Korean visitors show significant interest in studying Mongolia's economic reforms; according to the Mongolian side, North Koreans see them as non-threatening because they are a fellow non-Western country and went through similar experiences under communism.Mongolia's efforts to introduce free-market capitalism to North Korea also have a component of self-interest.