Here are some factors you can consider to evaluate the reliability of a law firm:

1. Professional Qualifications and Experience: Understand the professional qualifications and experience of the law firm’s team of attorneys background, including their expertise and experience in the areas of intellectual property and trademark registration.

2. Reference evaluation and reputation: Check the customer evaluation and reputation of the law firm. You can learn about their service quality and customer satisfaction through online reviews, recommendations or consulting other people's opinions.

3. Credibility and reputation: Understand the credibility and reputation of the law firm, including their status in the industry, awards and honors they have received, whether they have bad records, etc.

4. Service scope and commitment: Understand the scope of trademark registration services provided by the law firm, the specific process and time, charging methods, and their commitment to service quality.

5. Consultation and communication skills: Evaluate the law firm’s consultation and communication skills, including their response speed to your questions and needs, professional advice and explanation capabilities, etc.

When choosing a law firm, it is recommended that you conduct full investigation and comparison and make a decision based on your own needs and budget. You can consult with multiple law firms to learn about their services and fees, and share experiences and opinions with others to help you make an informed choice.

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