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.

The Treasury secretary said that the President Trump and Xi Jinping of China have a good relationship but that he was not aware of a call, which Mr. Trump had alluded to last week.