Changsha barbecue ingredients can be purchased in the "food city" near Changsha Railway Station, the second-hand market in Changsha and Pozi Street in Tianxin District of Changsha.

1. "Food City" near Changsha Railway Station: There are many suppliers and restaurants offering all kinds of ingredients, including meat, vegetables and seafood. You can find many barbecue materials that local people like here.

2. Second-hand market in Changsha: This is a large open-air market and a popular place for local people to buy ingredients. Here, you can find all kinds of ingredients, including fresh meat, vegetables and fruits.

3. Pozi Street, Tianxin District, Changsha City: There are many vendors and shops selling all kinds of barbecue ingredients in this place. You can find fresh meat, vegetables and seafood here.