Jim Mullinax, political and economic section chief at the US consulate general in Shanghai said: "Ten years ago, Shanghai might have been the only and most attractive destination for manufacturing."

"But the concerted efforts to shift the structure of the economy made Shanghai an example for the rest of China in terms of economic rebalancing," he said.

According to Mullinax, part of the shift requires some manufacturing companies to move out and focus on services and high-knowledge types of activities.

The region is destined to become an integrated area, a one-stop shop where companies can set up a site to innovate and design, finance, manufacture and sell products for the domestic market, said Mullinax.

"I think the Yangtze River Delta cities are at different stages of economic development. As manufacturing facilities move from Shanghai to the likes of Suzhou and Nanjing, Shanghai still has the opportunity to develop services that support these industries through various legal and financial services. That's Shanghai's core competence," he said.

Liu Jie, director of the media center at the Suzhou Industrial Park Administrative Committee in Jiangsu province, noticed a paradigm shift in the Yangtze River Delta from a region known mainly as a manufacturing hub into a high value-added, integrated region with various services including logistics, outsourcing and research and development.

"There is a growing dynamic of interaction within the region. Jiangsu no longer serves as Shanghai's hinterland. The Yangtze River Delta region is supporting Shanghai, and vice versa," he said.

To attract investment, zones such as the Suzhou Industrial Park have started to create mechanisms such as centers for small and medium-sized companies, and facilities dedicated to research.

According to Liu, there are competing zones within the Yangtze River Delta and each one has its specialty and agenda, aiming to serve the interplay of the whole region: Shanghai for services and multinationals, Jiangsu for manufacturing and Zhejiang for private companies.

The high-speed railway also became a game-changer because it traverses those three places within an hour, making Shanghai and its surrounding cities a well-developed metropolitan area with a specific division of work, Liu added.

AmCham's Shanghai President Brenda Foster said, as a result, more US companies are expanding from Shanghai to the Yangtze River Delta region, encouraged by policy incentives, lower costs and opportunities to extend their market penetration.

Foster said the transfer is a natural outcome and believes that a growing middle class with an increasing disposable income will drive more businesses to integrate their sales and manufacturing facilities further into the region.

"Shanghai will pass its manufacturing baton to the rest of the region, while it still has an edge in knowledge-based jobs," said Sun. "To that end, it will be a regional win-win story."

hewei@chinadaily.com.cn