The trade truce between the US and China appears increasingly fragile, as both sides trade barbs just more than a week after sending markets into euphoria by pausing sky-high tariffs on one another. China’s Commerce Ministry said Wednesday that it would take legal action against any organization or individual assisting the US in discouraging the use of China’s advanced semiconductors.

The Chinese government accused the Trump administration of undermining recent trade talks in Geneva after it warned that using Huawei Technologies Co.’s artificial-intelligence chips “anywhere in the world” would violate US export controls.