A deal has been signed that will see Chinese investment in new nuclear power stations in Suffolk and Essex.
French energy giant EDF and the China General Nuclear Power Corporation (CGN) have agreed a partnership for the development of plants at Sizewell and Bradwell.
It follows a deal between the two companies to work together to build a new plant at Hinkley Point in Somerset.
The announcement was made on the second full day of a visit to the UK by Chinese President Xi Jinping.
20% - Chinese stake in development of Sizewell C
66.5% - Chinese stake in development of Bradwell B
EDF said it had signed an agreement in principle to develop Sizewell C in Suffolk with CGN, with the Chinese firm having a 20% stake in the development phase.
An agreement has also been struck between the two firms to submit a Generic Design Assessment for Bradwell B, with CGN expected to take a 66.5% share.