[4] Aside from passenger services, the line also branched off into an air force complex located at the current Penbay International Circuit.

[3] In 1983, the completion of the Shuangyuan Bridge across the Gaoping River made car travel to Kaohsiung much faster and caused a decline in ridership on the Donggang line.

Afterwards, there were only ten round-trip services on the line, primarily served by a single DR2600 series car.

[6] The line continued to carry military supplies into the air force base until July 2002.

[7] In 2016, the Ministry of Transportation and Communications again proposed to reopen the Donggang Line as a light rail.