Core Technology & Advantages: Adopting the original patented double-step four-sided sealing technology, it achieves dual sound insulation effect comparable to luxury cars and high-speed rails, equipped with German professional soundproof hardware and T-type sound insulation system. It realizes silent opening and closing, effectively isolating indoor and outdoor noise. Meanwhile, the double-step structure provides excellent smoke-proof performance, which can serve as a safe escape space in case of fire. Supporting whole-house customized matching, including doors, cabinets, wall panels and other integrated home furnishing solutions, with unified color and style for the whole house.