while we build walls.

Laos and Malaysia, all the way to Singapore with huge economic "free zones" in each country. They want to build huge manufacturing cities in the free zones and bring in Chinese citizens to run them. They will then be able to use the resources of those countries and buy up the crops of those countries to feed their billions. So far only Laos has agreed but other countries are agreening in part. Malaysia is going to allow the rail portion of the plan from what I have read.

to the economy there of several nations.

There are services in North America that meet or exceed that.

Amtrak's Acela, as well as all electrically operated regional and long distance trains in the Northeast corridor routinely exceed 100mph/160kph.

Here is the GPS we had setup in our room on our trip on Amtrak's Silver Meteor (from my website https://northamericabyrail.info/ ):

Southbound:


And return trip northbound:


Here in Canada, track speed along much of VIA Rail's Ontario-Quebec corridor is 100mph/160kph (youtube video-not mine):

It’s a good thing. Symbiotic, a term the colonialists never understood.