For example, you are making a model of a Mercedes-Benz car. There are two issues in the design. The first is the appearance patent issue. If the appearance (including some detailed designs) patent is still protected in China Within the period, you will infringe his patent rights. Secondly, the trademark issue, if you use the Mercedes-Benz logo in the model, then you will infringe his trademark rights; patent rights are time-limited, and appearance patents are protected domestically. 10 years, but the term of trademark protection can be said to be forever~~, so you must pay attention to this when using it. I guess it is too expensive to obtain their authorization. Let's make some domestic ones, haha