Great pictures and it looks like several different trains are involved - understandably. Assuming (and hoping) they're your photos, I guess you had to get around a fair of bit rugged terrain to get half the shots you did which would have to be pretty time consuming.
Thanks for sharing. That bridge is impressive, as I imagine the tunnel is.
Thanks for your reading! It's my photos shot in June 2016. It took me about 2 hours to tramp over the hills. You can browse my older post as well! Hugs from China!