U.S. Trade Representative Robert Lighthizer points at markers on the floor as he leads Chinese Vice Premier Liu and Treasury Secretary Steven Mnuchin to their position for a family photo at the Xijiao Conference Center in Shanghai, China, July 31, 2019. Ng Han Guan/Pool via REUTERS

BEIJING (Reuters) - China’s foreign ministry said on Wednesday that the United States was to blame for flip-flopping in bilateral trade negotiations over the past year, after comments from U.S. President Donald Trump warning Beijing against stalling talks.

Foreign Ministry spokeswoman Hua Chunying made the remarks during a daily press briefing. Top U.S. and Chinese trade negotiators concluded their latest round of trade negotiations in Shanghai earlier on Wednesday.