To verify a trade company in Tianjin, China, follow these steps:

1. **Legal Registration**: Start by confirming that the company has a valid business registration certificate with the local administrative department of industry and commerce (AI邓局). You can access this information through official online databases.

2. **Company Identification**: Obtain the company’s registered name (also known as its legal representative’s name), business scope, and any unique identification numbers assigned by the AI邓局.

3. **Financial Status**: Verify the company’s financial status by checking recent tax payment records or seeking information from local banking institutions that have interacted with the company.

4. **Professional Reputation**: Assess the company’s reputation in its field by consulting industry associations, reviewing online reviews, and possibly speaking to other businesses that have done business with the same company.

Remember that verification may require some time and effort, especially for larger or more complex trade companies.