The China Railways DFH4 (Chinese: 东方红4) was a 6-axle high-powered freight and passenger locomotive, it did not reach mass production.

The first prototype unit (NY1) (neiran yeli chuandong meaning diesel-hydraulic transmission)[4] was produced in 1959 at Sifang locomotive works, and given the name 'Weixing'.

The class were used on passenger trains in northeast China, by 2010 most had been displaced, and some are believed to being used in industrial service.

[6] Between 2000 and 2002, thirty second-hand DFH3 were imported by the Korean State Railway for operation in North Korea,[7] numbered 내연901 to 내연930, although 내연903 is a Beijing class locomotive.

The first unit was produced in 1969 with an overall 5,000 hp (3,700 kW) machine with twin engine and hydraulic transmission.