It is "totally unreasonable to make random accusations," said a foreign ministry spokesman, Geng Shuang. On Wednesday, U.S. intelligence officials told Congress that China is the biggest commercial and military threat to the United States. A separate report this week said Beijing will steal or copy technologies it cannot make itself.
"The United States is the world's top power in terms of technology, we acknowledge that," Geng said. "But we hope that the US can see the scientific and technological progress of other countries with an open and inclusive attitude. It must allow others to make progress while developing itself."
On Monday, China's biggest technology company, Huawei, was indicted on U.S. charges including technology theft. The U.S. has objected to Chinese plans for state-led development of advanced technologies that American officials say violate Beijing's market-opening commitments.
President Donald Trump wants to see a rapid decline in the chronic U.S. trade deficit that could be difficult to achieve without fundamental changes to China's approach to developing its economy and lifting living standards for its 1.4 billion people.
The negotiators meeting in Washington face a March 2 deadline: the Trump administration is scheduled to escalate its tariffs on $200 billion worth of Chinese imports from 10 percent to 25 percent if a deal is not struck before then.