May be the lead in Chinese EV and battery industries is not purely technological, it is also the supply chain and scale developed over the years.
All this talk assumes that USA or Western countries have always had a level playing field whereas companies like Boeing or Airbus are prime counter examples
As I said, every country does it. It is rational to protect your own manufacturing industry. China does it. We do it. European countries do it. Just because we protect our own industry does not mean we have to protect China's interests too. That's their problem.
You can't eat the cake and have it. Either you follow the fair trade requirements or don't complain about others not doing the same. If you say standards, then follow by lead and respect them.
Also I do not think every country does that. There are too much pressure by the US, China and EU on these countries to prevent many from doing that.
The point here is that the US, China shouldn't try to prevent other countries from doing what they are doing and forcing them to harm their local economy and open markets under the disguise of free trade.