What kind of experience is it to take a train for more than 20 hours?

Traveling by train for more than 20 hours is really exhausting.

At that time, I went to play somewhere else. This is a terrible trip. When I got to my destination, I took a ride with my dad's friend. After I came back, I bought a train ticket directly to save money. After sitting for two or three hours, I feel ok. After sitting for six hours, I feel a little fidgety and my ass hurts. A little longer, it feels really torture. I always pour water, drink water and go to the toilet, otherwise I feel unbearable.

After that, I slept by the window for several hours. After waking up, you can only continue to play with your mobile phone or walk around. In short, I am distressed. If the train is delayed for something, I will feel very angry. I still feel dizzy after getting off the train, but I am really happy. It's like being locked up for so long before being released. You know, the train is crowded and noisy. Really tired. If you want to sleep, you have to grab your bag and be afraid of being stolen.