How is the North Factory and the South Factory in Harbin Pingfang District divided?

There are two large defense industrial factories and one light industrial factory in the bungalow area. Earlier, two defense industrial factories were one big factory, but later they were separated according to their specific functions. One is in the south of the bungalow, called Dongan Engine, and the other is in the north, called Hafei Group (now Hafei Aviation Industry Group and hafei automobile Group). Therefore, the two major factories are divided into South Factory and North Factory. The specific division is based on the road between the house and the kiln, and the south factory is on the east side of the road.