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

1. **Check the Regulatory Certificates**: Look for the business registration certificate, also known as “Company Registration Certificate” or “Business License”. This document verifies the legal existence of the company.

2. **Verify Company Information**: Access the local government’s business information database. The database should contain details such as company name, registered address, and registered capital.

3. **Check Online Platforms**: Some countries have official online platforms for verifying trade companies. For example, in China, you can use platforms like the “National Enterprise Database” or “China Enterprise Information Service”.

4. **Contact Local Trade Organizations**: Professional associations or chambers of commerce in Zhangzhou may provide verification services to members.

Remember that the process and requirements might vary depending on local regulations. Therefore, it’s advisable to consult with professionals familiar with the Zhangzhou trade landscape.