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The toilet of this green train is directly discharged, so in order to avoid polluting the railway station platform, the toilet door is opened ten minutes before arriving at the station and ten minutes after opening.
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As of 2017, the number of green trains in China is in jeopardy. To give you a brief list of China's medium and long-distance (main) green trains. Click images to enlarge.
The green train is good and inexpensive. Its speed is 120 h, which is the same as the speed of the Red Train, and it is comparable to the express train.
When entering the station, the toilet is disabled, and only when driving, using the high speed to dilute the excrement and splash it on the rails.
This should be mechanical, not electronic infrared, after all, the production of green cars was earlier, and electronic equipment was still very backward at that time.
The dense leather sofa is paired with a fruit bowl, and I think it will look better with beige.