LINXAI, a robotics development company in Shenzhen also known as LINXAI Robotics, announced that its medium quadruped model D30 successfully completed a load lift on the Galaxy Twin Towers—China's tallest pair of identical towers, reaching approximately 356 meters. The robot delivered a continuous payload of 33 kilograms to the 73rd floor and over 2000 steps.
The company presents this run not as a marketing stunt, but as a test of engineering capabilities for specialized inspections and emergency logistics. An unmodified evacuation staircase of the west tower was used, including six landings on refuge floors, which simulates real movement conditions in high-rise buildings.
LINXAI emphasizes that the 33 kg figure reflects the dynamic continuous working load during a full ascent, not the static limit stated in promotional brochures. Since climbing stairs increases impact load on joints, thermal stress, and center of mass shift compared to walking on flat ground, the firm asserts that the result is closer to real equipment supply missions and emergency deliveries.
The platform, theoretically weighing about 36 kg, is rated for a continuous load of around 30 kg and an instantaneous static load of up to 100 kg. CEO and CTO Lin Qinghun stated that marketing specifications are intentionally understated—this is an inverse understatement compared to the tower test—and that the objective is to demonstrate the leg strength of the platforms when overcoming obstacles, rather than setting speed records.
The technical achievements are due to self-developed joint modules: highly integrated reducers reduced the mass by approximately 15%, and specialized motors provide about 30% more torque at equal weight and about 40% better heat dissipation. Joint thermoregulation allows operation under full load for about 2.5 hours with controlled temperature increase.
Control is managed using LINXAI's SVIP reinforcement learning stack, which incorporates multimodal vision and LiDAR perception, adaptive locomotion intelligence, and an integrated training and deployment platform covering Real2Sim calibration and Sim2Real transfer simulation environments. This system is designed to handle empty steps and obstacle collisions, which are often incorrectly processed in standard stair climbing, while constantly recalculating balance under load.
The company positions D30 for patrolling high-rise buildings, inspecting hazardous areas, and delivering materials where elevators might fail. It is noted that this series is already used in energy corridors, petrochemical facilities, for security patrols, and in related industrial settings. Product variants include the pure quadruped D30, as well as D30W and D30WS with wheels, alongside the heavier D50 line, which features open mounting interfaces for sensors and tools.
For operators evaluating specialized robots, the twin tower climb is offered as practical proof that the medium quadruped platform can maintain payload stability close to its own weight over long sequences of stairs and refuge floor landings in simulated emergency conditions, without staged elements.