To verify a trade company in Shaanxi, China, you would typically follow these steps:

1. **Check the Business Registry**: The first place to look for authentic trade companies is the local government’s business registry. This online platform lists registered companies along with their registration details.

2. **Verify the Registration Number**: Each trade company in Shaanxi should have a unique registration number issued by the provincial administration of enterprise and industry (AEI). Verify this number against the official AEI website or directly through the company.

3. **Check Company Profile**: Many online business directories provide detailed profiles of registered companies, including information about their products or services, locations, and contact details.

4. **Contact the Company Directly**: If any doubt remains, it’s best to contact the trade company directly. They should be able to provide a confirmation of their registration in Shaanxi.

Remember that verification processes may vary slightly depending on the type of business and local regulations.