To verify a technical company operating in Jiangsu, China, you would follow these steps:

1. **Legal Registration**: The first step is to confirm if the company has legally registered with the local authorities in Jiangsu. This can be done by checking their Business License or registering their corporation.

2. **Trade Registration**: If the company is involved in imports or exports, it needs to be registered with the General Administration of Customs (GAC) in Jiangsu.

3. **Technical Certifications**: Depending on the nature of the technical services provided, the company may need to obtain relevant certifications such as ISO 9001 for quality management, or CE marking for compliance with EU standards.

4. **Online Presence Check**: Visit the company’s official website or platforms like Alibaba or to verify their credibility and offerings.

By following these steps, you can effectively verify a technical company operating in Jiangsu, China.