Good find Sun...I have seen that set before as I always found it weird because the middle flatbed did not go with the front and rear bullet train. The flat car in your set looks to have yellow wheels and white couplers where the one Listed in the auction has grey wheels and gray/black couplers. I am wondering if the one Listed came in a Diablock set.
I think these videos use the Diablocks on top of the flatbed.
I think these videos use the Diablocks on top of the flatbed.