it's impressive. Major improvement would be if all travelers in chinese trains would use headphones if they want to listen music or play games. Personally I love silence in Japanese trains - everybody is polite and silent.
Polite and silent is good, but it is awful if you end up in a smoking carriage, they are horrible. I think they will be going away soon though.
All high-speed trains in China are entirely non-smoking. Once or twice I've seen someone light up near the doors, away from the seats, and it's been dealt with fairly harshly by the train staff.