Both sides have agreed to continuously keep in close contact it said.
"The hard work of addressing structural issues to create a level playing field in China do not appear to have been resolved", said Lester Ross, a policy committee chief at the American Chamber of Commerce and also partner-in-charge at the Beijing office of law firm WilmerHale.
Chinese exports to the USA have held up despite tariff increases of up to 25 percent on $250 billion of Chinese imports, partly because of exporters rushing to fill orders before more increases hit.
Investors were encouraged that talks planned for two days were extended to three.
"Actively implementing the important consensus reached by the two heads of state, both sides held broad, in-depth and detailed exchanges on trade issues of mutual concern as well as structural issues".
Deputy U.S. Trade Representative Jeffrey Gerrish is leading the American delegation in Beijing.
American negotiators said in a statement Wednesday that there was a focus on discussing purchases of "a substantial amount" of agricultural, energy, manufactured goods and other products and services from the USA by China but did not specify any new deals.
Still, the US statement said the negotiations dealt with the need for any deal with China to be "subject to ongoing verification and effective enforcement" - a comment that reflects USA frustration that the Chinese have failed to live up to past commitments. -China Business Council. "That is very positive".
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Some analysts say that China - Pyongyang's key diplomatic ally and main source of trade - could use Kim's visit as a bargaining chip in the United States trade talks. An official Chinese newspaper warned Washington not to demand too much from Beijing as talks on ending their tariff war wound up a second day Tuesday with no word on possible progress.
The USTR statement emphasised American insistence on "structural changes" in Chinese technology policy, market access, protection of foreign patents and copyrights and cyber theft of trade secrets.
The restrictions on cars and soybeans were imposed as part of China's retaliation against Trump's decision to place tariffs on $50 billion worth of Chinese goods.
President Donald Trump talks to reporters as he departs for a visit to the US southern border area in Texas from the White House in Washington, US, January 10, 2019. Trump has complained repeatedly about the US trade deficit with China, which previous year likely exceeded the 2017 gap of $336 billion. Feng added that Russian Federation was China's major partner when it comes to trade growth dynamics.
US Dollar and China Yuan notes are seen in this picture illustration. "Progress should include a mechanism for the removal of tariffs and measurable, commercially meaningful outcomes", the U.S.
The Global Times commentary said China's growing economy means it can "carry out a more intense boycott" of trade with the United States if needed. US government data shows the Asian nation scooped up more than 2.6 million metric tons of beans in December and at least another 1.3 million were sold this year, according to people familiar with the matter.
"China is determined to bring the trade war to an end", The Economist has reported.
She added that the Trump administration's complaint that China is stealing US intellectual property is "top of mind" in the negotiations with Beijing. "The view, once commonly heard in Beijing, that it could outlast America in a grinding tariff battle has given way to the realisation that, as the country with the huge trade surplus, China has more to lose upfront".