Slow progress and disagreement on key initial demands from Presidents Donald Trump and Xi Jinping is raising doubts about whether the U.S. and China will actually return to the negotiating table to overcome their much deeper differences.

President Donald Trump reiterated that he could impose additional tariffs on Chinese imports if he wants, after promising to hold off on more duties in a trade-war truce he reached with China’s Xi Jinping last month.

U.S. Trade Representative Robert Lighthizer and Treasury Secretary Steven Mnuchin spoke on the phone with their Chinese counterparts as the two sides relaunch trade talks, marking the first high-level contact since their presidents agreed to a tentative truce last month.

President Donald Trump and China’s Xi Jinping are set to meet June 29 amid hopes they will hit the pause button in their trade war and resume the search for a longer-term peace.

There’s no change to China’s conditions for making a trade deal with the United States as the nations’ leaders prepare to meet this weekend, a government spokesman said.

FedEx Corp. has fired a new weapon in the simmering U.S.-China trade war, suing the Trump administration to block enforcement of trade restrictions that had placed the company in Beijing’s crosshairs.

Global trade stumbled in April as the tariff war between the United States and China showed few signs of ending, figures released June 25 showed.

Rocked by trade disputes, the possibility of a U.S. recession and the ever-present threat of political conflagration, the backdrop for emerging and frontier markets rarely has seemed less settled. Dare to look past the turmoil, though, and opportunities abound.

Chinese state soybean buyers asked U.S. exporters to delay cargoes scheduled for July loading into August, citing limited availability of storage capacity, according to people with knowledge of the situation.

China’s imports tumbled in May and a surprise rise in exports wasn’t enough to dispel concerns that the economic dispute with the U.S. will intensify and damage the global economy.