Chinese and American trade negotiators concluded their two-day meeting in Stockholm without a clear path forward to avert tariffs from skyrocketing back to ultra-high levels that formed an effective blockade on trade between the world’s two largest economies.

The United States and China have agreed to work on extending a deadline for new tariffs on each other after two days of trade talks in Stockholm concluded on Tuesday, according to Beijing’s lead negotiator.

China’s top trade official said the two sides had “constructive” and “candid” discussions and agreed to keep the tariffs at current levels — the United States taxing Chinese goods at 30 percent and China collecting 10 percent on US products.