China on Saturday launched seven satellites from the Xichang Satellite Launch Center in the southwestern province of Sichuan. The LEO broadband communication satellites, each weighing 190 kilograms, were mass-produced by China's private satellite developer GalaxySpace. Together with the company's first satellite of its kind that was put into orbit two years ago, the seven satellites make up a testing network to provide uninterrupted low-orbit satellite broadband communication services for more than 30 minutes at a time, becoming a major experimenting platform for China's satellite internet construction.