Trump recently enacted tariffs of up to 50% on washing machines and parts, and 30% on solar panels which, while applied globally, are seen as being aimed and South Korea and China respectively. These came after complaints by American companies to the US International Trade Commission that China was unfairly subsidizing solar panels and the South Korea was dumping washing machines into the US market.
South Korea has filed $711 million worth of annual trade sanctions with the WTO as a response, but China's adherence to WTO rules has been questionable since it joined and it has only filed for a discussion with the US.
What politically feasible options does China have to respond to this, short of a trade war? Thinking more international-relations focused but welcome domestic-policy related answers as well.