Western national-security exclusion of Chinese ICT and surveillance-equipment vendors

Investment-screening and procurement instruments used by the US, Canada, UK and Australia to force the exit or exclusion of specific China-linked ICT hardware vendors (video surveillance, network equipment) from domestic and government markets on national-security grounds. Distinct from us-cmic-investment-sanctions (a securities-investment ban on PLA-linked issuers), from western-china-cyber-sanctions-architecture (attribution-based sanctions on offensive-cyber companies), and from trilateral-chip-equipment-perimeter (export-control restriction on semiconductor tooling flowing to China). This theme captures the inbound-market side: governments using FDI/investment-screening authority and procurement rules to remove a named Chinese hardware vendor from their own domestic and public-sector markets, rather than restricting outbound exports or freezing assets.