To verify a technical company in Yankeishi, you would follow these steps:

1. **Research Online**: Begin by searching the company’s name along with “Yankeishi Technical Company” on reputable search engines like Google.

2. **Check Official Websites**: Visit the company’s official website (if available) to confirm their identity and presence in Yankeishi.

3. **Verify Registration**: Look for any registration details or licenses issued by local authorities. This will indicate that the company is legally operating in Yankeishi.

4. **Check Reviews and Testimonials**: Read customer reviews and testimonials on platforms like Google My Business, industry forums, or social media. Positive feedback can be an indicator of a trustworthy technical company.

5. **Contact the Company Directly**: If you are still unsure about the company’s authenticity, you can try contacting them directly through their provided contact information. This will give you an opportunity to ask questions and confirm their status.