To verify a trade company in Yunfu, a city located in the eastern part of China’s Guangdong Province, you would follow these steps:

1. **Check Official Sources:** The first and most reliable way is to visit the official website of the City Government of Yunfu (usually under ‘Business Administration’ or ‘Trade Regulation’). This will often contain information on verified trade companies.

2. **Verify Business Registration:** All trade companies in Yunfu must be registered with the local business administration department. Verify this registration by contacting them directly or checking their public records.

3. **Check Company Reviews**: While official verification is crucial, you can also check company reviews and ratings online. platforms like Alibaba, Baidu Business, or review websites specific to Yunfu might provide insight into the credibility of trade companies.

Remember that while these steps can help, it’s always advisable to exercise caution when verifying any business entity.