[4] The EMU 400 had a demonstration run on November 9, 1990 with an invitation to the general public to ride train, before opening for official service the next day.

The cars also have floor columns near the doors and ceiling grab bars to accommodate a larger number of passengers.

[4] The center of the ceiling is equipped with a square grid pattern pointing in the direction of the operator, where the loudspeaker and the air conditioning’s return outlet are hidden.

The through-door between the carriages is a double-fold sliding door, which is the only model of Taiwan Railways equipment to adopt this design.

After the EMU400 trains were removed from regular service in October 2015, some were parked in the Taiwan Railway's Qidu Yard.