On this day, 38 years ago, on March 15, 1987 (February 16, 1987, the lunar calendar), a major explosion occurred at the Harbin linen factory. At 2:39 a.m. on March 15, 1987, a major explosion occurred in the three workshops of Harbin Flax Factory: combing, front spinning and spinning. At that time, it was initially found that 56 people were killed and 179 others were injured. Plant and equipment were damaged. The explosion was caused by linen dust exceeding the safety factor.