HONG KONG -- If each gigabyte in a zettabyte were a brick, 1 zettabyte (ZB) would be enough to build 258 Great Walls of China -- each with nearly 3.9 billion bricks. That is how an analyst at U.S. networking company Cisco once described the staggering amount of digital data the world is accumulating.
Analysts say Chinese President Xi Jinping has been consolidating power and strengthening Communist Party control over a range of matters, including the country's vast trove of data. © Nikkei montage/Source photo by Getty Images
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