Joe Biden has moved to restrict US investment in Chinese technology, signing an executive order which focuses on a few, sensitive hi-tech sectors including semiconductors, quantum computing and artificial intelligence (AI). It is the latest in a series of measures taken by the US to restrict China’s access to the most advanced technology and comes as the president has embarked on a multi-state tour of the south-west to tout his plans to revive American manufacturing after decades of decline. The restrictions are expected to take effect next year – and come at a sensitive time in the US-China relationship. The...