China to sanction US officials for 'nasty' behaviour over Taiwan

US officials who have engaged in "nasty" behaviour over Chinese-claimed Taiwan will face sanctions, China's foreign ministry said on Monday, after Washington lifted curbs on exchanges between US and Taiwanese officials. ​​​​Ties have worsened as China has already condemned this month's easing, announced by US Secretary of State Mike Pompeo in the waning days of President Donald Trump's presidency.