A girl visits Smart China Expo in Chongqing, Southwest China, yesterday. Representatives including heads of international organizations, academics and high-level enterprise officials from nearly 60 countries and regions, and more than 800 domestic and foreign enterprises are attending the expo. More than 20 new technologies and products in the field of big data intelligentization will be released at the four-day expo themed “Smart technology: empowering the economy, enriching life.”Xinhua