The China "Summer Davos" summit, due to be held in September in the north China city of Tianjin, will again focus on sustainability and the green economy, said Andre Schneider, managing director of the World Economic Forum (WEF), Tuesday.

The detailed agenda would be designed to meet the changing new growth context with more discussion of new business models and technical innovations, Schneider said in a press briefing in Beijing.

The "Summer Davos" 2010, or the fourth Annual Meeting of the New Champions, would be a continuation of the third-round meeting last year, which had focused on the way out of crisis, said Schneider.

With the theme, "Driving Growth Through Sustainability," this year's summit, from Sept. 13 to 15, is expected to attract more than 1,500 participants, including business executives, politicians, economists and scientists from about 90 countries.

On the global economy picture, Schneider said the deep financial and structural roots of the "Great Recession" made it difficult to predict the shape of future growth.

Schneider said the future also remained unclear for advanced economies, which the Organization for Economic Cooperation and Development forecast, would see a possible 10-percent unemployment rate in the second half of this year.

Though the emerging and developing economies accounted for almost 50 percent of global GDP, their growth was not decoupled from the rest of the world, said Schneider.