Chinese Foreign Ministry spokesman Lu Kang said the extension of the trade talks to an additional day showed but sides were "indeed very serious" about resolving trade issues.
Stocks rallied globally on the positive tone of the talks and optimism that Washington and Beijing can avert an all-out trade war.
While there were indications that China would be open to buying more USA agricultural and energy products and allowing market access, demands for Chinese structural reforms to halt forced technology transfers and intellectual property theft were greater hurdles in the discussions, people familiar with the talks said.
"If it is immediately after these talks, it really means that something executable is going to happen; if it is next month or so, then you have a feeling that things are not really that executable for the moment".
That pledge, addressing a trade deficit in goods, was however mentioned only at the end of the statement which focused on the USA demands for structural changes to China's domestic policies. The council and other US business groups have pressed for a resolution to the trade hostilities between the world's two biggest economies. In a Tweet Tuesday morning, President Donald Trump said the talks were "going very well!".
Also Tuesday, North Korean leader Kim Jong-un arrived in Beijing in a possible effort to co-ordinate with the North's only major ally ahead of a possible meeting with Trump.
Members of the USA delegation told reporters the talks progressed well.
The U.S. -China trade war began when Trump imposed a 25 percent tariff on $50 billion worth of Chinese goods last July and August. Trump has complained repeatedly about the USA trade deficit with China, which a year ago likely exceeded the 2017 gap of $336 billion.
China's foreign ministry confirmed the negotiations had ended in Beijing but declined to comment on the outcome, saying details would be released later.
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Defensive lineman Akiem Hicks echoed those thoughts. "I'm excited, especially as a defensive guy". He's expected to be introduced as the club's 17th head coach on Thursday.
But the statement did not say if the two sides have reached any agreement during the talks that concluded on Wednesday.
One apparent breakthrough this week was an announcement by China that it would approve the imports of five new varieties of genetically modified crops, a decision for which USA farmers and businesses had waited years.
"Removal of these tariffs must be a priority, to address the damage that has been done to American companies that depend on trade with China, and to the USA economy as a whole", the group said.
People familiar with the discussions said positions were closer on areas including energy and agriculture but further apart on harder issues.
But the enthusiasm was wearing thin by Thursday, when Hong Kong's Hang Seng index fell 0.5 percent in early trading while the Nikkei 225 in Tokyo dropped 1.4 percent.
One of the biggest challenges to any deal would be to ensure that China enforces whatever is agreed to stop technology transfers, intellectual property theft and hacking of U.S. computer networks. Forecasters expect American orders to slump this year.
The group also urged the removal of USA tariffs when China delivers on its promises.
For its part, Beijing is unhappy with US export and investment curbs, such as controls on "dual use" technology with possible military applications. They include changes to China's policies on intellectual property protection, technology transfers, industrial subsidies and other non-tariff barriers to trade. They complain China's companies are treated unfairly in national security reviews of proposed corporate acquisitions, though nearly all deals are approved unchanged.