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 Stockholm meeting, following similar talks in Geneva and London, is set to extend a 90-day pause on those tariffs. During the hiatus, U.S. tariffs have been lowered to 30% on Chinese goods, and China set a 10% tariff on U.S. products.

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.