What do you mean by a quiet car?
Quiet cars first appeared in Sydney, Australia. In 2020, the Shanghai subway will ban the sound of electronic equipment, and some trains of Beijing-Shanghai high-speed railway and Chengdu-Chongqing high-speed railway will try out quiet cars.
Quiet car provides passengers with a quiet and comfortable car environment to relax.
The emergence of silent cars is conducive to creating a more civilized riding environment.