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

1. **Check Online Platforms**: The first step is to use official online platforms provided by the Shenzhen Government. These include the深圳企业信用网 (www.gkmsz.gov.cn).

2. **Verify Company Information**: Access the website and search for your intended trade company. Check if the registered company name matches, along with their registration number.

3. **Check Business License**: If the information is available online, verify that the company has a valid business license issued by the Shenzhen Administration Bureau.

4. **Review Public Recordings**: Sometimes, public records can provide additional verification. Check if the trade company appears in relevant government databases or news articles.

Remember to be cautious and double-check any information you find. If you’re still unsure about the authenticity of a trade company in Shenzhen, seek advice from professional services or local authorities.