To verify a trade company in Gaobeidian, follow these steps:

1. **Check Official Channels**: The first step is to visit the official government websites related to trade registration and verification. In Gaobeidian’s case, it might be “Gaobeidian Bureau of Industry and Information” or similar.

2. **Verify Registration Documents**: Once you locate the official website, look for a section dedicated to company registration details. There, you should find a list of registered companies with their respective trade licenses.

3. **Contact the Company Directly**: If the information provided on the government website is not sufficient, you can also try contacting the trade company directly. They should have a copy of their registration documents and can confirm your verification efforts.

Remember to maintain accurate records and keep updated with any changes in regulations or company status.