1. Promotional activities or special prices: Sometimes, in order to attract customers or clear inventory, merchants will carry out promotional activities and sell goods at a price lower than the market price. In this case, the Kunlun membrane in 40 yuan may be true.
2. Low quality or inferior goods: Another possibility is that the Kunlun membrane provided by the merchants is of poor quality and does not meet the normal standards. In this case, the Kunlun membrane in 40 yuan may be a fake.
To sum up, whether the Kunlun membrane in 40 yuan is true or not needs to consider the specific sales channels, the reputation of merchants and the evaluation of other consumers. If it is purchased through formal channels, the merchants have a good reputation, which is likely to be a promotion or a special price. But if it is purchased through informal channels, or the business reputation is not good, it may be low-quality or inferior goods. Before purchasing, it is recommended to do more investigation to ensure that Kunlun membrane products meet expectations are purchased.