In Ningguo, a prominent difference between trade companies is their focus on different sectors within the local economy.

Trade companies operating in Ningguo typically operate in one or more of the following sectors:

1. Textiles and Clothing: Trade companies operating in Ningguo primarily deal with imported textiles, clothing, and other related goods.

2. Machinery and Equipment: Trade companies operating in Ningguo also deal with imported machinery and equipment, including vehicles, engines, and components for various industries.

3. Food and Beverage: Trade companies operating in Ningguo also deal with imported food and beverage products, such as processed meat, dairy products, and fresh produce.

4. Tourism and Travel Services: Trade companies operating in Ningguo also deal with imported tourism and travel services, including transportation services, accommodations, activities, and more.

In conclusion, trade companies operating in Ningguo typically focus on sectors within the local economy that require importing of goods or services. These trade companies play a critical role in promoting economic growth and development in Ningguo and its neighboring regions.