1, luxury goods: Some luxury brands strictly control the sales channels of their products and do not authorize third-party online retailers to sell their authentic products. So buying luxury goods online is very risky.

2. Health products and medicines: Because health products and medicines are related to human health, many countries strictly supervise their sales. Therefore, when buying health care products and medicines online, you need to be very careful to avoid buying fake and shoddy products.

3. Second-hand goods: buying second-hand goods, especially high-value goods, such as luxury cars and jewelry, is very risky online. Because you can't personally check the real situation and quality of the goods, and you can't guarantee the security of the transaction. Authentic products refer to genuine products, genuine products and genuine products, as opposed to counterfeit, imitation or inferior products.