In Jiangxi, some of the most popular trade companies are:

1. China Southern Airlines Co., Ltd: Known as China’s flag carrier airline, it operates domestic and international routes and is considered one of the most prominent trade companies in China.

2. Huanqiao Bank Co., Ltd.: One of China’s largest banks, it has a wide range of financial products, including consumer loans, mortgages, and structured finance instruments.

3. Wujin Group Co., Ltd.: A Chinese multinational conglomerate that operates in various industries such as energy, chemicals, transportation, and retail.

4. Baozi Group Co., Ltd.: Another Chinese multinational conglomerate that operates in various industries such as energy, chemicals, transportation, and retail.

5. Jiangxi Railway Co., Ltd.: One of the largest state-owned railway enterprises in China, it operates passenger and freight rail services across China’s five provinces (Anhui, Fujian, Jiangsu, Zhejiang), with major routes serving major cities in China such as Beijing-Shanghai Express, Xi’an-Guangzhou Express, Shanghai-Beijing High Speed Train, and more.

These are just a few examples of some of the most popular trade companies in Jiangxi. There are many other reputable companies operating in various industries across China.