We're not as smart as China.
Do you know how much CO2 and other waste was created in building that? Do you know how much continues for decades as it cures and the power plants create to run it?
You idiots fail to think critically about what you post up. The concrete will vent gases for decades. The train needs oil and lubricants daily. The Train needs repairs and energy to run... there are more gases and waste in creating that mess than the use of ICE engines would have done during its life span. But you think China is cool.... go live there if you think its so cool..