High-speed rail in #China in 2007: 0 kilometers
High-speed rail in China in 2026: 50,400 kms
High-speed rail in China in 2030 (projected): 60,000 kms

On routes where it competes directly with planes, HSR has led to a 28.2 % reduction in air passenger volume.

@straphanger took EU a bit longer, but I'm sure their reduction in air traffic is similar, if not bigger, as there are better onward connections.

All you need is political will.