The garden and the pai lou gateway outside were constructed by about 50 workers, artisans and support staff from Shanghai, under special work visas in 2006.
It was officially opened in September 2008, and is one of only three authentic Chinese gardens outside China and the first of its kind to be built in the southern hemisphere.
Dunedin City Council property group manager Anna Nilsen said the experts were visiting to provide advice on maintenance of the site.
"They’re working with our team to understand the traditional Chinese construction of the garden so that we can continue to maintain it."
She said the garden was standing up really well, but the building was built with traditional Chinese methods, which were better suited to Shanghai’s hot and humid weather.
"So we’re just now figuring out how the building is adjusting to the cooler weather in Dunedin, and to the salt air here.
"We’re deconstructing one of the gables to understand how it’s built, and then we’ll put it back together so that we can work around the building and make repairs in a like-for-like type of fashion.
"The craftspeople that are here are going to help us to understand those construction methods."
Mrs Nilsen said some windows had deteriorated in the Dunedin weather, and a replacement set had been built in Shanghai.
They were now being shipped to Dunedin and the delegation would provide advice on how to install them once they arrived.
"That help is invaluable, and it’s just demonstrative of our relationship with Shanghai and the garden."
The delegation will be in Dunedin for two days.
While here, they would also visit the gardens at Olveston and Larnach Castle, she said.
