David Cameron has held talks with Chinese president Xi Jinping as part of his role leading a billion dollar investment initiative between the country and Britain.
The former prime minister tweeted a photo of himself discussing plans for the £750 million UK-China fund and a "golden era" in relations.
Mr Cameron is acting as vice chairman for the fund to improve ports, roads and rail networks between China and its trading partners.
Alongside the photo of himself with the Chinese premier, Mr Cameron said: "Excellent meeting & enjoyable dinner with President Xi Jinping in Beijing, to talk about the 'Golden Era' in UK-China relations & plans for the new UK-China Fund."
The UK-China fund's launch was announced as part of a series of deals hailed by Chancellor Philip Hammond during a trade visit to China.
Around £1.4 billion worth of commercial deals were announced at the UK-China economic and financial dialogue in Beijing attended by Mr Hammond.