map by User:Cnbrb / CC BY-SA (https://creativecommons.org/licenses/by-sa/3.0)
from Wikimedia Commons https://commons.wikimedia.org/wiki/File:UK_High_Speed_2_rail_map.png
CRCHI First made-in-China Compound Tunnel Boring Machine for Super Steep Urban Rail Transit Project Was Launched Successfully.
http://en.crchi.com/art/2023/7/20/art_40592_4605514.html