Illegal
This situation is likely to involve counterfeit products. The same product cannot have two different trademarks.
The essence of a brand is that the brand owner's products, services or other advantages over competitors can bring equal or higher value to the target audience than competitors. The values ??include: functional benefits and emotional benefits. In a broad sense, "brand" is an intangible asset with economic value. It uses an abstract, unique, and identifiable mental concept to express its difference, and thus occupies a certain position in people's consciousness. Brand building is long-term. In the narrow sense, "brand" is a kind of "standard" or "rule" that has both internal and external aspects. It makes it unique, valuable, and long-term by standardizing and regularizing the four aspects of concept, behavior, vision, and hearing. A general term for a recognition system of sex and cognition. We also call this system CIS (corporate identity system) system.