To verify a technical company in Sanya, you can follow these steps:

1. **Research Online**: Start by looking up the company’s official website or their registered domain name. This will often lead to information about their registration with relevant authorities.

2. **Check Government Database**: In China, you can access government databases like the ‘National Enterprise Credit Information System’ (ECCC). Search for the company’s registration number or other identifying details.

3. **Contact the Company Directly**: If the official channels don’t provide enough information, reach out to the company directly through their provided email address or phone number. This might help you verify their authenticity.

Remember that verifying a company’s technical capabilities involves checking not only its registration but also its past projects and testimonials.