"It is being papered", Conway said when asked if a deal were still possible this year to address some trade disputes between the world's two largest economies.
Conway added that the phase one trade deal could be completed before the end of the year but it would be up to China. She added that US President Donald Trump will not place artificial timelines on reaching a trade deal with China.
Technology transfers and intellectual property theft are some of the key issues being negotiated in the first phase of the agreement.
The world’s two leading economies have been engaged in a trade war for over a year over what Trump deemed unfair economic conditions and non-competitive behaviour from China. China has denied such claims, saying that the trade row is not beneficial to either side and the world economy. The standoff translated into tit-for-tat hiking of tariffs in imported goods between the countries.