Should it be relatively quiet on the train?

should be maintained.

I think this is what everyone needs to do, because people need to have their own personal space. And many people will also work on the train, including learning something. They certainly don't want to be disturbed by others at this time, so everyone should keep quiet on the train.

according to the news of "China Railway", from December 23rd, when passengers buy tickets for designated trains of Beijing-Shanghai high-speed railway and Chengdu-Chongqing high-speed railway through the website of Railway 1236, mobile phone App and ticket vending machine, if they need quiet space, they can choose "quiet car" service, and "quiet car" is located in No.3 carriage (second-class car).

after clicking on "please assign me a quiet car" seat first, the seat will be assigned to car No.3, and five "silent" conventions will automatically pop up. Please keep quiet in quiet car.

Please wear headphones or turn off the audio playback function when using various electronic devices; Please turn the phone to mute or vibrate; Please leave "quiet car" when answering or talking to each other; Please take good care of your children and avoid noise. Special reminder: It is not recommended for passengers with babies to buy "quiet car".