ET7 5335 started life as a standard TKp type 0-8-0 tank built by Fablok (Chrzanow) in Poland for China around 1960. At some stage it was rebuilt into a tender engine with a new cab, higher running plate, repositioned air pump and air receiver amongst other modifications. The modifications didn't do much to prolong its life and by 12 April 1988 it had joined the ranks of redundant engines at Baotou Steelworks' loco depot.