A Chinese chip start-up has launched what it claims to be the world’s first 8-inch production line for two-dimensional (2D) semiconductors, marking the country’s latest push to develop alternative chip technologies amid US curbs on its access to advanced chipmaking equipment. Shanghai-based Yuanjiwei on Thursday unveiled the pilot production line, saying it supports tape-out – or final stage of chip design – and covers the entire manufacturing process from 2D material preparation to chip...