U.S. and Chinese officials began a second day of talks in Stockholm on Tuesday to resolve longstanding economic disputes and step back from an escalating trade war between the world's two biggest economies.

Beijing's top trade official says China and the United States have agreed to work on extending a deadline for new tariffs on each other after two days of trade talks in Stockholm.

Chinese and US delegations met for their second day of trade negotiations in Stockholm, with both sides said to be aiming to extend a truce due to end in two weeks' time.The 90-day truce is meant to end on August 12.