To verify a trade company in Changde, China, you can follow these steps:

1. **Official Channels**: The first step is to use official channels provided by the Chinese government. This includes the Trade Registration Information System (TRIS), the National Business Credit Information System (NBICS), or the local bureau of statistics.

2. **Company Identification**: Obtain the company registration number, also known as the “营业执照” code. This unique identifier will help you locate the company in official databases.

3. **Online Search**: Use search engines like Baidu or Google with relevant keywords such as “Changde trade company verification,” “Company registry Changde,” etc.

4. **Contact the Company Directly**: If needed, you can also contact the company directly through their provided contact information to verify their authenticity.

Remember that verifying a trade company might require additional permissions or access rights if dealing with sensitive business information.