China is winning contracts to build out HSR in other countries. It’s not just about land sovereignty within China. CRRC has won construction contracts in multiple countries in Europe and Asia. When you build more high speed rail miles than the rest of the world combined, you tend to know what you’re doing.
I will point out, the #3 top selling vehicle in the UK is a Chinese SUV with a gasoline engine (Jaecoo 7).
I think the idea that China just can’t make a reasonably competitive ICE vehicle is another outdated notion about China.