When purchasing, first check if the safety helmet has clear product identification, including manufacturer, brand, model, and implementation standards (such as GB2811-2019). A qualified safety helmet should have a smooth appearance, without obvious cracks, bubbles, dents, or other defects. The helmet shell and lining should be firmly connected, and all components should be tightly assembled. Gently shake with your hands without any looseness. At the same time, it can be checked whether the adjustment of the hat hoop is smooth, whether the chin strap, back neck hoop, etc. are intact and can be used normally. If possible, you can also check the quality inspection report of the batch of products to confirm whether they meet the relevant standards.