GUIYANG -- An international expo on big data concluded Friday in Southwest China's Guizhou province, with contracts worth more than 50 billion yuan ($7.6 billion) signed.

The three-day China International Big Data Industry Expo 2021 in the provincial capital Guiyang was attended offline by 225 enterprises from home and abroad. A total of 324 companies participated online. According to the executive committee, 144 projects were signed during the expo.

In addition, 98 events including forums and high-level dialogues on topics ranging from data security and digital services to digitalization of industries were held.

Over 800 latest high-tech products, technologies and solutions were displayed.

With the annual theme, "embrace digital intelligence, deliver new development," this year's expo attracted nearly 100,000 visitors.