One reason China invests heavily in trains is that they provide large capacity.
China needs to transport literally hundreds of millions of people over a week once or twice a year (National holiday and Chinese New year) on top on regular transport between megalopolis.
"All CRH trains are formed of eight or 16 cars with capacity ranging from 494 to 1299 seats. The busiest routes can be served by up to 101 services per direction per day, with up to eight trains per hour at peak times. Traffic density on such routes is estimated at about 30-40 million passengers" [1]
China needs to transport literally hundreds of millions of people over a week once or twice a year (National holiday and Chinese New year) on top on regular transport between megalopolis.
"All CRH trains are formed of eight or 16 cars with capacity ranging from 494 to 1299 seats. The busiest routes can be served by up to 101 services per direction per day, with up to eight trains per hour at peak times. Traffic density on such routes is estimated at about 30-40 million passengers" [1]
[1] https://www.railjournal.com/in_depth/chinese-high-speed-an-e...