At 5:30 in the morning, the city was still immersed in dark blue mist, and Wu Riwen's cell phone alarm clock was already ringing like a precise supply chain warning signal. She reached out to press the ringtone and ran her fingertips across the three emergency messages that popped up on the screen - Supplier A's high-strength alloy plates were stranded at the port due to heavy rains, Supplier B's logistics fleet encountered a traffic accident on the inter-provincial highway, and there were only 27 sets of 300 sets of precision bearings urgently needed by the production department in stock.