On Friday, China announced it will cut heightened tariffs imposed on American-made cars by 25 percent. The move, which will last for 90 days starting Jan. 1, is part of the truce that President Trump and Chinese President Xi Jinping agreed to at the G-20 summit in Argentina.

Cutting the tariffs is a welcome development — and one that, along with the other provisions of the truce, highlights what is and is not likely to be achieved in any final agreement with China.