On Thursday, Osborne was visiting the Taishan nuclear power station in Guangdong province in China's south. The plant is a collaboration between EDF and the state-owned China General Nuclear Power Co.
"While any initial Chinese stake in a nuclear power project is likely to be a minority stake, over time stakes in subsequent new power stations could be majority stakes," said a British Treasury statement. "Any investment from any country has to comply with rigorous regulatory standards for safety and security."
Earlier, the two governments signed an agreement to collaborate on civilian nuclear power, including investment, technology and construction.
China has the world's fastest-growing nuclear power industry. It relies on foreign technology for its generating stations but is trying to develop its own reactors and other equipment.