大興安嶺山脈
Nenjiang–Greater Khingan Forest railway or Nenlin railway (), is a single-track railroad in northeastern China between Nenjiang and the town of Gulian, in Mohe County. It is also known as the "Nenjiang–Mohe railway" or "Nenmo railway" (). Both of the railway's terminals are located in Heilongjiang Province. In between, the line traverses the Greater Khingan range of Inner Mongolia. Much of the line is located within the jurisdiction of the Greater Khingan Forest District, a special forestry prefecture that covers parts of both Inner Mongolia and Heilongjiang.