To verify a trade company in Dengta, you would follow these general steps:

1. **Check Official Sources**: The first step is always to visit the official databases or websites of local authorities. In Dengta’s case, this might include the City Administration or Economic Development Bureau.

2. **Search Public Registry**: Many cities maintain a public registry for businesses, which includes details like registered names, company numbers (if applicable), and legal addresses.

3. **Verify Company Documents**: If the trade company is active, you should expect to see updated documents such as business licenses, tax certificates, or registration certificates.

4. **Contact the Company Directly**: For a more reliable confirmation, you can try contacting the trade company directly through their provided contact information.

Remember that verifying a trade company’s authenticity and legitimacy may require time and effort, especially if dealing with foreign entities.