First of all, it needs to be clear that Haidilao is an enterprise engaged in catering services, and its business activities are regulated and restricted by law. On this basis, let's analyze whether it is legal for Haidilao not to bring its own ingredients.

On the one hand, from the perspective of consumers' rights and interests, it is understandable that customers bring their own ingredients, because this is an act of independent choice, and consumers have the right to choose their own catering service providers. If Haidilao blindly restricts consumers' independent choice, it will inevitably lead to consumers' dissatisfaction and resistance, which will have a negative impact on corporate image and operation. At the same time, if consumers are discriminated against or disrespected when dining in Haidilao, it may also infringe on the legitimate rights and interests of consumers.

On the other hand, from the perspective of food safety and hygiene, the practice of sea fishing seems to have some truth. In the catering industry, food safety and hygiene have always been the focus of attention, and food poisoning incidents have occurred from time to time. If the ingredients brought by customers have safety problems, it will not only affect the health of customers, but also endanger the health of other customers. Therefore, from this perspective, Haidilao prohibits customers from bringing their own ingredients, which is also to ensure the food safety and hygiene of customers.