A stewardess posts a sign in a quiet car on a train on the Beijing-Shanghai high-speed railway Thursday. Six trains on the line launched a quiet car Thursday, aiming to offer a more tranquil and comfortable ambiance for passengers. In the No. 3 car, onboard videos are muted and announcements are made at a lower volume. Doors at the ends of the car will be kept closed to reduce noise from the vestibule. Phone calls should be made or answered outside the car while phones should be muted or turned to vibrate mode during the trip. Passengers willing to obey the rules can choose “quiet car” when booking tickets on the official ticketing website or mobile app 12306.Xinhua