There are two cases of trademark infringement:
The one is the risk of infringement of the prior trademark right.
After determining the categories and groups involved in the products or services, search the trademarks to be used, analyze the degree of similarity of the same or similar trademarks, then learn about the actual use of the prior trademarks, evaluate the possible infringement risks detailed and give professional advice at last.
Another is the risk of infringement of other rights.
Analyze whether there is a risk of infringement of prior rights of the third party such as prior copyright in the trademark to be used and give professional advice.