Core Viewpoint - Users in multiple regions of Qinghai reported sudden interruptions in China Unicom's signal, affecting services such as payments and ride-hailing [2] Group 1: Incident Details - On the evening of November 13, users experienced a disruption in mobile signal due to a communication network failure [2] - China Unicom in Qinghai issued an announcement confirming the signal interruption and stated that the issue has been resolved [2] Group 2: Company Response - China Unicom expressed sincere apologies to users for the inconvenience caused and thanked them for their patience and understanding during the outage [2]