After a well-known trademark is recognized, the scope is limited, and which trademark is a well-known trademark is also restricted.

For example: Yierkang is a well-known trademark in "shoes", so what font is the Yierkang designed in, that is, this design is a well-known trademark on the shoes.

But it does not mean that all its sub-brands are well-known trademarks.

---So unless the sub-trademarks owned by the owner of a well-known trademark are recognized as well-known trademarks, they are not well-known trademarks in other ways and are just ordinary trademarks.