DF4.0003, no not that one, the other one, the DF4C, left Beijing's main station with with the empty stock of T298 from Mudanjiang on the morning of 26 November 2017.
While Dalian and Ziyang built DF4C were numbered in the vacant 4xxx and 5xxx number series, Datong built DF4C were given numbers that duplicated those of the original DF4s, leading to much confusion.