“@USTradeRep and I concluded constructive trade talks in Beijing,” the U.S. Treasury Secretary Steven Mnuchin announced on social media network Twitter on Friday.

“I look forward to welcoming China’s Vice Premier Liu He to continue these important discussions in Washington next week,” he added, but gave no details.

Mnuchin and U.S. Trade Representative Robert Lighthizer were in the Chinese capital for the first face-to-face meetings between the two sides since President Donald Trump delayed a scheduled March 2 increase in tariffs on $200 billion worth of Chinese goods, citing progress in trade negotiations.