US Trade Representative Robert Lighthizer,pictured with Chinese Vice Premier Liu He in July.Credit:AP
Lighthizer told CBS that a date and location for senior US and Chinese officials to formally sign the agreement is still being determined.
The deal was announced on Friday after more than two-and-a-half years of on-and-off negotiations between Washington and Beijing.
It will reduce some US tariffs on Chinese goods in exchange for increased Chinese purchases of US agricultural,manufactured and energy products by some $US200 billion ($291 billion) over the next two years.
China has also pledged in the agreement to better protect US intellectual property,to curb the coerced transfer of American technology to Chinese firms,to open its financial services market to US firms and to avoid manipulation of its currency.
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Chinese purchases of agricultural goods are expected to increase from $US40 billion ($58 billion) to $US50 billion ($73 billion) annually over the next two years,Lighthizer said.
The United States exported about $US24 billion ($35 billion) in farm products to China in 2017,the last full year before the world's two largest economies launched a tariff war on each others'goods in July 2018.