To verify a trade company in Tangshan, a process similar to those followed for verifying businesses typically involves these steps:

1. **Check Official Registry**: The first step is to consult the local business registration authority, such as the Tangshan City Bureau of Industry and Information. They maintain an up-to-date database of registered companies.

2. **Verify Company Name**: Compare the trade company name with that listed in the official registry. If there’s a discrepancy, further investigation might be necessary.

3. **Check Business Registration Documents**: Request for the company’s registration certificate or business license. These documents should indicate the authorized personnel and company information.

4. **Review Online Presence**: Visit the company’s website (if available), social media accounts, and any other online platforms where they may have a presence. This can provide additional context about the company.

5. **Consult Industry Experts**: If necessary, consult with experts in the industry that the trade company operates in. They might be able to validate the company’s authenticity based on their knowledge.

Following these steps should help you verify a trade company in Tangshan effectively.