Chinese and American trade negotiators concluded their two-day meeting in Stockholm without a resolution 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 U.S. and China had agreed to pause most of the sky-high tariffs on each others’ goods amid trade negotiations – but that pause is set to expire in August.

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.