(From left) Domenico Dolce, Lin Dan and Stefano Gabbana in Shanghai on March 19 at Lin's book signing. Photo provided to China Daily

Best known for its sensual Mediterranean style, the brand will be able to attract more young consumers through the collaboration with Lin, experts say.

"Lin Dan is the right fit for Dolce &Gabbana," says Melody Kong, a business analyst from China Market Research Group in Shanghai.

"He has a model-like body, he is charming, good-looking, healthy, powerful, hardworking and successful. Currently the brand image that Dolce &Gabbana has in China is 'luxury, sexy, feminine and extravagant'. Lin Dan could bring a more up-to-date image and help the brand better target successful, affluent young professionals," Kong says.

The house has previously used actresses Monica Bellucci and Scarlett Johansson to represent the brand in public. It has also dressed several female Chinese stars including Fan Bingbing and Bai Baihe. But it is yet to have a female Chinese ambassador. The designers believe everything has to come from genuine, personal connections.

"Everything starts with a relationship. I can't program something from a picture. For example, we found Lin Dan and he came to see the show. Day by day, it has grown. It's like you meet somebody and you become friends. We don't want to choose from a catalog," says Gabbana.

Just months ago, the designers made a special capsule collection for the Chinese New Year, which highlights the signature Chinese red.

"Do you know why I'm so envious of the Chinese? Everything looks good on them. I'm not always like this," Gabbana says, laughing. "We love the contrast between the Sicilian style and the Asian people."

"The first customer of Dolce &Gabbana is the Chinese, not just the Chinese from China, but the Chinese from the world. For us, the Chinese culture is exotic, unusual and elegant at the same time," he adds.

Chinese clients now frequent Alta Moda, the haute couture line of the brand that began in 2012. The shows have been held in exotic venues such as Capri, Venice and Sicily. Only top clients and a handful of selected media are invited. The number of Chinese clients has grown to around five, all of whom the designers have come to know personally.

"We become friends. It's like a Dolce &Gabbana family," Gabbana says.

During the party in Shanghai, these VIP clients naturally become the focus of attention with their gorgeous dresses the designers have personally tailored for them.

Dolce and Gabbana have been working together for more than 30 years. Regardless of the ups and downs in their personal relationship, their collaboration has never stopped taking the fashion world by storm. The latest example is the 2016 winter collection inspired by "the love for mamma", featuring pregnant models and small children in the brand's dazzling dresses.

Asked about the secret of working together so well for so long, the two burst into laughter.

"It's like the Chinese saying of 'the yin and yang'. The opposites attract. If you have the white, you need the black. If you eat rice all the time, you don't know the spaghetti," Dolce says.

Gabbana says, jokingly, that one would have to consult a mystic to learn how the two have worked together for so long.

"We love each other. We are like two brothers, modern brothers. I believe in him and he believes in me. I love him and he loves me. It's a sense of family."