An indoor stadium packed with spectators, featuring a central volleyball court, bright overhead lights, and colorful banners. Suitable for sports events, showcasing a lively and energetic atmosphere.

A 3D model of a Haier air purifier, featuring white and gold finishes, sleek ventilation grilles, and a modern minimalist aesthetic. It has low polygon count and is suitable for home or office environments. (注：原类目"Office Appliances"不准确，核心物体为家用/办公空气净化器，更准确归类为Home Appliances)

A 3D model of a Security Camera, featuring a black top cover, silver high-definition lens, and metal arm, with a modern, minimalist design. It has adjustable angle and is suitable for office or home security monitoring.

A 3D model of a Haier floor-standing air conditioner, featuring a sleek white plastic and metal body with a Haier logo, and a modern clean design aesthetic. It has detailed ventilation grilles and low polygon count, suitable for home and office environments. （注：原类目Office Appliances可能不准确，柜式空调更属Home Appliances，已纠正。）