It reduces competition for Chinese goods, making them cheaper and more accessible to less rich countries.

All those cars and solar panels that Chinese companies counted on selling in the US must go somewhere. Every other country in the world (excluding the EU, although to a lesser extent than the US) isn't hell-bent on sanctioning China, their production will be just redirected elsewhere.

And since the US, biggest net importer in the world, just stopped... importing, there will be more goods sought after by less money, AKA more supply (old supply + goods that can't profitably be sold in the US anymore) but less demand (since the US just passed these new tariffs) and as you know, this is gonna make prices fall, maybe not a drastic fall but still.