Yet analysts say the Chinese leader is likely holding out for concrete deliverables before agreeing to the high-profile meeting. Trump dramatically escalated the trade war with the world's second-largest economy in April, rolling out sweeping new tariffs that prompted China to respond with its own export duties and other measures.

When top U.S. and Chinese officials meet in Stockholm, they are almost certain to agree to at least leaving tariffs at the current levels while working toward a meeting between their presidents later this year for a more lasting trade deal between the world's two largest economies,