By Trevor Hunnicutt and Eduardo Baptista ABOARD AIR FORCE ONE/GYEONGJU (Reuters) -U.S. President Donald Trump may have teased that he could discuss Nvidia's state-of-the-art artificial intelligence Blackwell chips with Chinese President Xi Jinping,

The US president says: "On the scale from zero to 10, with 10 being the best, I would say the meeting was a 12." Beijing says the results were "hard won".