Prime Minister Theresa May has looked to play down any Chinese disgruntlement over her decision to delay the Hinkley Point project, declaring it a "golden era" in Britain's relations with China.
Mrs May said she was heading to the G20 summit with the ambition for Britain to be a global leader in the free trade market after Brexit.
The Prime Minister wants to use her first major global summit to show the UK remains "dependable" in the wake of the EU referendum result but faces potential awkwardness over the delayed Hinkley power station project.
Although she will be holding face-to-face talks with Chinese president Xi Jinping, she is not expected to use it to announce a decision on the Hinkley, which is backed by Beijing's state-owned nuclear firm.
Mrs May will have a meeting with President Xi on Monday after the conclusion of the two-day summit in Hangzhou.
What is the next step for the delayed Hinkley project?
A decision on whether the project in Somerset will go ahead is expected this month, but UK officials indicated it would not be announced at the meeting with the Chinese leader, fuelling speculation it may be scrapped or altered.
"We have set out the Government's approach to Hinkley, we are currently considering all the component parts of that," a UK source told the Press Association.
"We have said we will make a decision this month, that remains the plan. I don't expect one in the next few days and I don't expect our Chinese or French partners are expecting one in the next few days."
French energy giant EDF, with support from China General Nuclear, had expected to build the £18 billion plant, but Mrs May delayed making a final decision on the project.
The decision on Hinkley Point has major diplomatic implications for relations between the UK, France and China - even more so since the UK is seeking a new role on the world stage following a vote for Brexit.