Enterprise Dunedin director John Christie, speaking from China, said the couples and their family members - numbering up to 100 people in total - were expected in Dunedin in November.
They would have wedding photographs taken at Dunedin's top attractions and tie the knot in the city, he said.
The benefits for Dunedin would come from a short-term cash injection and the exposure the city would received on social media in China, he said.
"Those rose weddings are a really significant thing in China. They take real pride in getting all their photos and that done. It's a really, really big occasion.
"Getting Dunedin on the itinerary for that is a significant one for us, and one that we hope will grow as a result of this inaugural one."
The upcoming event was discussed by Mr Christie as he took part in the Dunedin City Council's latest delegation to China.
Deputy mayor Chris Staynes and council chief executive Sue Bidrose travelled to China last week, accompanied by Mr Christie and Enterprise Dunedin's China project co-ordinator, Hui Zhang.
The group's itinerary included meetings and presentations in Shanghai, Guangzhou, Zhengzhou and Beijing, including a get-together with Shanghai's vice-mayor, Xu Kunlin, at which he praised Dunedin as "the exemplar of sister cities".
The group also discussed plans for Dunedin to feature in an upcoming three-day Belt and Road "brand expo" in Shanghai, beginning at the end of June, which was expected to be visited by up to a million people, Mr Christie said.
A second Belt and Road expo in November, details of which were yet to be finalised, promised to be even bigger, and Dunedin was again expected to feature, he said.
There were also meetings with the Shanghai Foreign Affairs office, the Shanghai Chamber of Commerce and Shanghai Education Commission, among other organisations.
Other opportunities discussed included Dunedin's involvement in an upcoming New Zealand film festival in China, the upcoming opening of the joint Non-Communicable Diseases Centre, continuing staff and student exchanges and further collaboration on arts and culture initiatives, he said.
The trip was estimated to have cost the council $24,500, including air fares, accommodation and other expenses, while the group's hosts picked up other costs.
Dr Bidrose returned to Dunedin last week, after the Shanghai leg of the trip, while Mr Staynes covered his own costs as he continued on a private trip after his civic duties.
Mr Christie is flying home over the weekend and Mr Hui in the coming days.
