The China International Big Data Industry Expo 2019 began on Sunday in Guiyang, capital of Guizhou province. The expo focuses on topics like digital economy, technological innovation, data security and integrated development.

More than 26,000 participants from 55 countries and regions are expected to attend the four-day event. Among them, 46 are Chinese and foreign ministerial officials and 119 are from international organizations and foreign governments, the Guizhou provincial government said.

Representatives of 473 companies from home and abroad will also participate in the expo, up 82 percent from the year before.

Here's what some of the experts and company representatives said at the expo.