The GUOYOU EX-HB-001 is a high-back executive office chair featuring polished aluminum arms, designed to deliver a premium, formal aesthetic paired with structured ergonomic support for extended seating. Its visual profile is defined by a tall, contoured backrest with subtle light tufted detail on the lumbar zone, paired with sleek, shiny square-profile aluminum arm frames that complement the black smooth upholstery for a refined, professional look. The chair sits on a reflective polished aluminum 5-star base fitted with black dual-wheel casters accented with chrome hood trim, creating a cohesive, upscale appearance suitable for professional settings. Constructed with commercial-grade components, the chair uses artificial leather upholstery secured with high-tensile polyester stitching, padded with molded polyurethane foam across the seat and backrest. Its inner support structure combines plywood and steel tubing for structural stability, while the tilt mechanism is a black-pnted steel synchronous chassis paired with a chrome-plated steel gas lift cylinder. The armrests feature rigid aluminum alloy frames topped with padded leather surfaces, and the die-cast aluminum 5-star base provides a sturdy foundation, fitted with black nylon dual-wheel casters. Functionally, the chair offers pneumatic seat height adjustment via a right-side lever, with 100mm of total vertical travel to accommodate different desk heights and user statures. Its synchronous tilt mechanism allows coordinated seat and backrest recline at a 1:2 ratio, with multi-position locking and an under-seat tension adjustment knob for personalized support. The chair supports 360-degree continuous swivel rotation, and its dual-wheel casters enable smooth rolling on hard office floors and low-pile carpet. Fixed-height upholstered armrests provide consistent forearm support, while the integrated contoured lumbar shaping and top headrest section deliver passive lower back and neck support for tall users in upright seating positions. This chair is well-suited for a range of commercial and residential spaces. In commercial settings, it fits private C-suite and senior management offices, boardrooms as head-of-table or guest seating, premium co-working private suites and dedicated member zones, and executive floor reception areas for medium-duration visitor stays. For residential use, it complements high-end home office setups that prioritize a professional executive aesthetic, with a seat height range compatible with standard desk heights. For procurement planning, the chair ships in a knock-down flat pack configuration, with assembly completable by a single person using standard tools. Each unit is packed individually, with gross weight per carton reaching 25 kg, and a 20ft contner load capacity of 180 units for bulk orders. When sourcing, teams should confirm exact material grades, component specifications and floor compatibility with the supplier to align with specific project requirements.