Investment contracts worth 572 billion yuan (90 billion U.S. dollars) were inked at the first Western China (Sichuan) Import Expo and International Investment Fair, said organizers on Tuesday.

The five-day expo, which closed on Tuesday in Chengdu, capital of the southwestern Sichuan province, saw 713 investment deals worth 30 million yuan or more each. Projects with investment of more than one billion yuan accounted for nearly 70 percent of the total.

Participants also reached trade contracts worth 4 billion yuan at the expo with an exhibition area of 83,800 square meters.

The fair is a new platform of cooperation and opening up for Sichuan in line with the country's Belt and Road Initiative, the Yangtze River Economic Belt and the western development strategy, said Wu Xiankui, a provincial government official.

It will boost investment and trade in the development of Sichuan and western China, he said.

The fair attracted more than 2,400 companies from 34 countries and regions as well as 16 Chinese provinces.