Big smoke is rare from Pingdingshan's engines, which run with clean stacks most of the time, but it does make more dramatic pictures. This pollution will soon clear, unlike that from the thousands of vehicles which clog Pingdingshan's busy roads day and night. JS 6225 erupted from Shenxi yard, one of two major yards on the system, on 24 September 2002. JS class 2-8-2s formed the bulk of the Pingdingshan steam fleet.