Complex sentence: In May 1987 a devastating fire swept the Da Hinggan forests, destroying perhaps of timber; it became known as the Black Dragon Fire, for the Heilong Jiang ("Black Dragon River"; i.e., the Amur) that flows through the area.
Split into simpler sentences: In May 1987 the devastating Black Dragon fire swept the Da Hinggan forests, destroying perhaps of timber. The Black Dragon Fire gained its name from the Heilong Jiang ("Black Dragon River"; i.e., the Amur) that flows through the area.