How big security data is scanning the holiday crowds in China

The system amalgamates location-based services

For most people heading to Shanghai’s Bund area over the Lunar New Year, there will be few outward signs of change from four years ago when 36 people were crushed to death.

The victims died under the weight of a crowd that had gathered to celebrate the start of 2015, catching revellers in a fatal bottleneck as they tried to move up and down a staircase.