The 2026 China International Big Data Industry Expo is being held in Guiyang, Guizhou. According to an official from the National Data Bureau, the second batch of pilot data annotation projects will be launched in 32 cities. Together with the previous seven cities, a total of 39 cities will participate, covering key industries such as industrial manufacturing and healthcare. Data annotation involves adding labels to raw data, and the annotated data can be used to train artificial intelligence.