They have 14,000 miles of high-speed rail with an additional 10,000 coming in 10 years. They move 1 billion people a year.
They are also developing production low-speed maglev trains.
That is a proven technology though. A completely different case.
Their maglev train was built by Siemens and ThyssenKrupp in Germany, the _real_ leader in high speed rail transportation.
Their high-speed rail train is not maglev. There is one built by Germany in Shanghai, but it was more of a demo than an actual infrastructure.
It doesn't work like that. If you sell significant goods in China, you have to manufacture there and your methods will be copied. China is moving towards economic autarchy very quickly.