Shares of China Rareearth soared 13% in HK market. Top U.S. and Chinese officials will resume trade talks for a second day in London on Tuesday, hoping to secure a breakthrough over export controls for goods such as rare earths that have threatened a global supply chain shock and slower economic growth.

The two sides met at the ornate Lancaster House in the British capital on Monday to discuss disagreements around the Geneva deal, and are due to resume talks early on Tuesday before both sides are expected to issue updates.

The U.S. side is led by U.S. Treasury Secretary Scott Bessent, Commerce Secretary Howard Lutnick and U.S. Trade Representative Jamieson Greer, while the Chinese contingent is helmed by Vice Premier He Lifeng.

The inclusion of Lutnick, whose agency oversees export controls for the U.S., is one indication of how central rare earths have become. China holds a near-monopoly on rare earth magnets, a crucial component in electric vehicle motors.

Lutnick did not attend the Geneva talks at which the countries struck a 90-day deal to roll back some of the triple-digit tariffs they had placed on each other.

Trump's often erratic policymaking on tariffs has roiled global markets, sparked congestion and confusion in major ports, and cost companies tens of billions of dollars in lost sales and higher costs.

The second round of meetings between the two sides comes four days after Trump and Xi spoke by phone, their first direct interaction since Trump's January 20 inauguration.

Following the call Trump said Xi had agreed to resume shipments to the U.S. of rare earths minerals and magnets, and Reuters reported that China has granted temporary export licenses to rare-earth suppliers of the top three U.S. automakers.