The top 20 most popular trade companies in Anshun can be described as follows:

1. Anshun International Trade Co.
2. Global Trade Alliance Anshun
3. Anshun Import Export Enterprise
4. China Anshun Trading Group
5. Anshun Hub for Global Business
6. Anshun Commercial Exchange Inc.
7. International Trade Center Anshun
8. Anshun International Business Alliance
9. Anshun Trade Services Limited
10. Anshun Foreign Trade Cooperation Association

These companies are recognized for their extensive trade networks, reliable services, and contribution to the local economy in Anshun.