Elon Musk and other powerful executives who accompanied President Trump to China are hoping to clear roadblocks put up by Beijing.

Beijing’s acknowledgment on Wednesday that tariffs were discussed in talks with President Trump signals it was prepared to push back if the U.S. revives duties.

President Trump is returning home from Beijing after a two-day summit that achieved a few deals but left investors and analysts underwhelmed.

The deal, if it materializes, would be a major win for Boeing, which has lost ground to Airbus in one of the world’s largest aviation markets.