The Year 2021-2022 saw the official launch of national security review in the UK，with the National Security and Investment Act 2021 going into effect in January 2022 and nineteen accompanying regulations and guidelines published. Most notably，the seventeen “key/sensitive” sectors which will be subject to more scrutiny are more clearly defined. The UK has also been arguably the first among advanced economies to highlight higher education and research-intensive sectors as an area of heightened concern. Chinese investment in the UK rebounded in 2021 after the 2020 low，now back as Europe’s second largest destination of capital outflow from China. But the first nine months of 2022 have also witnessed an unprecedented five troubled cases of Chinese investment in the UK，involving such more sensitive sectors as advanced materials，advanced technology，and critical infrastructure. Against a shifting landscape in both geopolitics and domestic politics，future Chinese investment in the UK will have to face greater scrutiny，in particular，those sensitive areas or sectors that have now been perceived as “sensitive”.