It comes after Chinese negotiators agreed to extend their stay in Washington.
Both countries are pushing to strike a trade deal.
The latest development could mean that a breakthrough agreement is on the horizon.
Both nations are desperate for a way out of 2018's punishing trade war.

UAE and Thailand conclude trade deal talks
Abu Dhabi unveils major AI training programme for government and public
IMF reaches staff deal with Pakistan, potentially unlocking $1.2 billion
African Union launches continent's first credit rating agency
e& reverts to Etisalat to pay homage to 50 years in business
