To verify a technical company in Xiamen, China, follow these steps:

1. **Check Company Registry**: Visit the local government’s business information portal. In Xiamen, it might be the Xiamen Administration for Industry and Commerce (AIIC). You can search by company name or registration number.

2. **Review Official Documents**: If the company is listed, check their business license, tax registration, and any other relevant certificates issued by the local authorities.

3. **Verify Online Presence**: Check if the company has a website with a domain registered in Xiamen. This can be done through search engines like Google.

4. **Check References**: Reach out to the company’s past clients or partners to verify their credibility and technical capabilities.

By following these steps, you will have a comprehensive way to verify a technical company in Xiamen.