Chinese President Xi Jinping and President Donald Trump greet attendees waving American and Chinese national flags during a welcome ceremony outside the Great Hall of the People in Beijing, China, on Nov. 9, 2017.

China said on Friday it would respond quickly to protect itself if the United States hurts its interests, as U.S. President Trump gets ready to unveil revisions to his initial tariff list targeting $50 billion of Chinese goods.

Chinese foreign ministry spokesman Geng Shuang made the comments at a daily news briefing.

Trump is due to give details later on Friday. The list will contain 800 product categories, down from 1,300 previously, according to another administration official and an industry source familiar with the list.