The original purpose of this design was to simplify the waste disposal process while the train was in motion and to avoid problems like unpleasant odors and water accumulation in the toilet.

Compared to other modes of transportation, trains move at high speeds, and the space between the tracks is relatively wide. Designers believe that this discharge method will not have a significant negative impact on the environment. Moreover, when the train is running at high speeds, the waste is quickly dispersed by the airflow, thereby reducing direct pollution to the tracks and surrounding environment.

So, if the waste in train toilets is discharged directly, why do the tracks still appear relatively clean and tidy? This is mainly due to the following aspects:

First, track maintenance is regularly performed. The railway department