US Treasury Secretary Steven Mnuchin said he was "looking forward" to crunch negotiations with China as he emerged in Beijing on Tuesday with global attention focused on whether the two sides can reach a trade deal.
Asked if the United States and China were getting close to a trade agreement, she said: "It looks that way, absolutely".
After that date, USA tariffs on $200 billion worth of Chinese imports are scheduled to increase to 25 percent from 10 percent.
Trump said talks in Beijing are "going well", but acknowledged bilateral talks between him and Xi are unlikely to come to pass before the current March 2 deadline. Trump had said final resolution of the trade dispute would depend on the meeting with Xi "in the near future" but told reporters it had not yet been arranged.
Trade talks between the US and China have resumed and China is reportedly upbeat. She argued that her nation has "always respected and safeguarded freedom of navigation and flight based on worldwide laws in the South China Sea, but resolutely opposes any country falsely using these [to] harm the sovereignty and security of coastal countries".
In Washington, Trump's advisers are considering proposing a second Mar-a-Lago summit for "as soon as mid-March", Axios reported.
"He has forged a mutually respectful relationship with President Xi", Conway said. It has also imposed a 10 percent tariff on another $200 billion of made-in-China goods.
The United States is expected to keep pressing China on longstanding demands that it reform how it treats American companies' intellectual property in order to seal a trade deal that could prevent tariffs from rising on Chinese imports.
In September, a Chinese warship came within just 45 yards of a US destroyer, raising concerns about the possibility of tensions boiling over into conflict. "And, absolutely, you know, we've put everything on the table, including IP theft and forced technology transfer and so on".
Communist superpower China claims ownership over nearly all of the South China Sea - frequently slamming the United States and its allies for naval operations in the territory. The American-side often doesn't announce such sail-bys in the South China Sea, where China's claims overlap with those of Brunei, Malaysia, the Philippines, Taiwan and Vietnam. Clay Doss, a spokesman for the U.S. Navy's Seventh Fleet, obtained by ABC News.