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As night falls in Beijing's Jinrongjie, its public square transforms into a lively gathering spot for dance enthusiasts, with different dance groups filling the space. However, for the residents in nearby apartment complex, the dancers' loud music became a long-standing source of frustration. So a practical solution was urgently needed. Amid the tension, innovative directional sound wave technology provided a perfect fix, allowing both the dancers and residents to coexist peacefully.