China's President Xi Jinping pledged "self-reliance and self-strengthening" to develop AI in China, state media reported on Saturday, as the country vies with the U.S. for supremacy in artificial intelligence,

Chinese leader Xi Jinping has not spoken to US President Donald Trump on the phone recently, Beijing said Monday, reiterating that no talks are taking place between the two countries to resolve their tariff war.

Trump has held up tariffs as a negotiating tool with China and claimed talks are ongoing, but Beijing says so far there have not been any negotiations.