Open wagons ，Letter code: C, gondola is suitable for carrying large equipment and bulk goods, such as coal.        

The Open wagons is characterized by no cover and four side panels, two of which have side doors that can be opened to facilitate unloading of goods.

Flat wagons，letter code: N,The Flat wagons has the advantages of simple structure, convenient use, easy maintenance, large carrying capacity, and less pollution. Usually consist of a full, flat floor with no or only a low superstructure open at the top. Flat wagons are used to transport goods that are not weatherproof. It is convenient to load and unload large and heavy goods, and it can load more goods than other models of the same specification.