There is no business circle around Nanjing South Railway Station, so there are not many food choices. The following are some restaurants that may be suitable for you:

1. Nanjing South Railway Station Food Plaza: Nanjing South Railway Station Food Plaza is located in Nanjing South Railway Station, offering various snacks, fast food and special foods, such as roast duck, salted duck, steamed buns and Lamian Noodles.

2. Jixiang Ruyi Restaurant: Jixiang Ruyi Restaurant, located near Nanjing South Railway Station, is a Chinese fast food restaurant that provides all kinds of rice, noodles, soup and stir-fried dishes.

3. McDonald's and KFC: There are McDonald's and KFC fast food restaurants in Nanjing South Railway Station, which provide various fast food such as hamburgers, French fries and fried chicken.

4. South Station Hotel Restaurant: South Station Hotel Restaurant is a restaurant that provides Chinese breakfast, lunch and dinner, with a variety of dishes and relatively affordable prices.

In addition, I suggest you use food apps such as Public Comment to find more food choices near Nanjing South Railway Station.