Using the trademark on similar products without the authorization of the trademark holder is an infringement.

It has nothing to do with similar platforms such as Taobao. Sales on other platforms are also infringement.

A few additional points: 1. If it is sold by a brand agent on the platform, it is generally not considered infringement; 2. It is best to register and protect trademarks in time; 3. It is recommended not to operate illegally.