I get your point, but that's a slightly inconvenient comparison. Shenzhen - Beijing is ~1200 miles, SF - NY is ~2600 miles. At the highest passenger rail speeds out there, the trip would probably end up being 12-18 hours.
There are several hundred miles of very tall mountains in the way. Unless someone is contemplating a century long project to dig a tunnel, those miles will be taken at a crawl.
Heck, even the geography between NYC and Chicago--which would be potentially interesting based on crow flies distance and amount of travel--almost certainly makes HSR not viable.
