Now Washington has passed the US Chips and Science Act with tens of billions of dollars for the US semiconductor industry, what of its effect on China? Post technology journalist Xinmei Shen speaks with her Beijing-based colleague Che Pan about why the 3-nanometre revolution in semiconductors is so vital and how China's semisconductor industry might compete. SCMP technology editor Zhou Xin analyses how Beijing sees the new law, and how the US push to form the Chip 4 coalition is a bid to…