Complex sentence: In 1992, MIAT bought five Chinese Harbin Y-12 commuter aircraft and acquired a Boeing 727-200 from Korean Air, one more following in 1994.
Split into simpler sentences: In 1992, MIAT bought five Chinese Harbin Y-12 commuter airliners. Also by 1992, MIAT had acquired a Boeing 727-200 jet from Korean Air with one more following in 1994.