US President Joe Biden Wednesday signed an executive order that will prohibit some new US investment in China in sensitive technologies like computer chips and require government notification in other tech sectors. The long-awaited order authorises the US Treasury secretary to prohibit or restrict US investments in Chinese entities in three sectors: semiconductors and microelectronics, quantum information technologies and certain artificial intelligence systems. The administration said the restrictions would apply to “narrow subsets” of the three areas but did not give specifics. The proposal is open for public input. The order is aimed at preventing American capital and expertise from...