President Donald Trump has long promised to get tough on China. So why is he so worried about saving jobs there? Last week the Chinese telecommunications giant ZTE said it had halted its major operations after the US government moved to ban US companies from selling software or components to ZTE. On Sunday, Trump tweeted that he and Chinese President Xi Jinping were working together to save ZTE. "Too many jobs in China lost," Trump tweeted.

Get in-depth coverage of current and future trends in technology, and how they are shaping business, entertainment, communications, science, politics, and society.