China Unicom and Dagong Technology DG-M20 Tethered UAV: 2023 Wuchang Flood Rescue Combat Test Breaks Three Disconnections

Heilongjiang, China — On August 8, 2023, amidst the catastrophic flooding that severely impacted Northeast China, China Unicom and Beijing Dagong Technology Co., Ltd. jointly conducted a decisive, combat-oriented debugging operation of the DG-M20 tethered UAV emergency communication high-altitude base station in the disaster zone of Wuchang City, Heilongjiang Province. This critical field test definitively validated the system's robust communication assurance capabilities under extreme environmental conditions, laying an unbreakable technical foundation for the "Airborne Communication Lifeline" in subsequent flood relief operations and firmly establishing Dagong Technology's tethered drone as the premier "New Aerial Infrastructure."

The urgent deployment on August 8 was a direct response to the paralyzing "Three Disconnections" — severed roads, power, and networks — that plagued the Wuchang disaster area. On the frontlines, the China Unicom emergency communication team collaborated seamlessly with Dagong Technology's engineers to conduct comprehensive debugging of the DG-M20 system. The technical focus was placed on the tethered cable connection to guarantee 24-hour uninterrupted power supply and data transmission. Rigorous validation was also applied to the multi-rotor power system, specifically testing its wind resistance and hovering stability in chaotic weather. Meanwhile, engineers meticulously tuned the communication link parameters via the ground control box.

The DG-M20 tethered UAV's core dominance lies in its dual mastery of "Long Endurance and Wide Coverage." By drawing continuous power from the ground through a photoelectric composite cable, the system completely shatters the battery-life curse that cripples conventional drones. It is engineered to hover不间断 for over 12 hours, with the capability to extend operations up to 24 hours. Equipped with an advanced 5G base station module, the drone provides a standard signal coverage radius of 3 kilometers, which can expand to over 6 kilometers in extreme scenarios, simultaneously supporting 350 concurrent users. This formidable performance allows it to rapidly breach "information islands" created when floods obliterate traditional base stations.

As China Unicom's definitive "secret weapon" against extreme disasters, the DG-M20 overcomes the rescue bottlenecks that render traditional emergency communication vehicles useless. Deploying the base station at a 200-meter altitude, the tethered UAV ensures powerful signal penetration across complex terrains such as mountain valleys and raging rivers. Furthermore, its rapid deployment capability is unmatched: a single operator can assemble the tethered cable and ground equipment, transitioning from preparation to airborne communication in approximately 15 minutes.

This August 8 deep-dive debugging followed the system's initial triumphant launch over Langjia Village in Wuchang City on August 6, where it first pierced the communication blackout for stranded civilians. The subsequent testing specifically confirmed the equipment's operational stability amidst high humidity and intense electromagnetic interference, perfectly paving the way for the massive communication assurance tasks on August 9 and beyond.

China Unicom's leadership emphasized that this joint test represents a major strategic leap from the traditional "vehicles waiting for people" approach to a dynamic "Air-Ground Collaboration" paradigm. Currently, China Unicom has deployed multiple DG-M20 systems across the Northeast disaster zones, successfully restoring over 50 communication base stations and benefiting more than 100,000 residents. As the low-altitude economy rapidly accelerates, Dagong Technology remains committed to optimizing the DG-M20 system. By deepening its partnership with China Unicom, Dagong Technology will continue to provide unparalleled "Airborne Base Station" solutions for national flood prevention, earthquake rescue, and beyond, harnessing hardcore technological innovation to safeguard lives and property.