Earthworks for the venue of the China "Summer Davos" summit, to be held in September in the north China city of Tianjin, was completed Wednesday.

Xu Xiangyong, safety supervisor of the Meijiang International Convention and Exhibition Center project, said the center, which would be able to accommodate more than 4,000 people, covered 230,000 square meters and would be able to withstand an 8-magnitude earthquake.

The center would be surrounded by an artificial lake of 380,000 square meters and bamboo groves and green islands.

"The lake, greenery and the building's glass roof were designed to help purify the air and save energy for the convention center, which will be in service before May 31," said Xu.

The summit would focus on sustainability and the green economy, said Andre Schneider, managing director of the World Economic Forum (WEF), on March 24.

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.

The Chinese cities of Dalian and Tianjin have offered to host three summer versions of the Davos forum.