Li Yan, the founder and owner of Silkroad Diamonds, was one of the first Chinese to become involved, in the 1990s, in Antwerp's diamond business.

She was a violinist in the city, and on an off chance some of her friends in China asked her to find a diamond wholesaler in Belgium. She took this new opportunity and ended up starting her own diamond business in 1996.

Her office is now in one of Antwerp's diamond bourses. When she opened her double security door for me, she was wearing a beautiful dress that combined the beauty of the East and West.

"It's from a local Antwerp brand," she smiled, adding that its pattern reminds her of China.

Li's company was the official diamond partner of the Belgian EU Pavilion at Expo 2010 Shanghai.

Li says that in the past the Chinese tended to buy diamonds under one carat but recently younger people are starting to buy bigger stones.

"Now the Chinese market is a barometer of Antwerp's diamond industry. If the demand from the Chinese market is not strong, the price will drop quickly," Li says.

Not only are Chinese dealers aware of the importance of their home market, but Belgian companies have also begun to adapt to the new situation.

Wang Tingting, a young Chinese woman who was hired by Dayekh Diamond last year, has been given the task of dealing with Chinese customers.

According to Alexander Dayekh, the store was established by his father 10 years ago and mainly sold diamonds to Russian and US customers. But after he became involved in the family business, he began to explore the Chinese market. Now more than 60 percent of his customers are Chinese, which is why he hired Wang, the company's first Chinese employee.

The company's diamond polisher, Edgar Gapamajian, has worked in the industry for 12 years. The biggest diamond he has polished in recent times was for a 24-year-old Chinese woman. "In the past, Russians were the ones who usually bought such big diamonds," he says.

This four-carat diamond was sold through a contact from Wang's account with WeChat, a Chinese instant messaging service.

"The Chinese buyer lives in London and through my WeChat account I've sent her many pictures and chatted with her about our products," Wang says. "Then she flew to Antwerp to visit us."

The Belgian government and local associations are also paying a lot of attention to the Chinese market.

Antwerp Vice-Mayor Ludo van Campenhout says that there are 1,850 registered diamond companies in Antwerp, and each year 38,000 Kimberley Process certificates are issued there. These certificates are granted to ensure that no diamonds are traded to finance unlawful rebel movements.

"Therefore the city of Antwerp plays a role that is similar to that of New York in international banking and finance," he says. "What New York is to the money markets, Antwerp is to the global diamond trade."

Diamonds are the main trading product for Russia, India and China, he says.

According to Van Campenhout, China is the leading importer of polished diamonds from Antwerp. In 2012, 31.3 percent of Antwerp's polished diamonds headed to China.

"Exports of diamonds, rough and polished, from Antwerp to China increased 73 percent in value between 2007 and 2012," he says. "This share grew during the financial crisis and stabilized afterward - not only because demand in general is rising, but also because of the Chinese interest in diamonds as an investment."