For passengers who need to change or return their tickets, they can change the tickets or get their fund through 12306.cn or the ticket office at the station.
对于需要改签或退票的乘客，他们可以在12306平台上或在车站售票处就能改签或退款。
2
Websites like Top100.cn and Google are doing that.
谷歌和Top100.cn等网站正在进行这样的行为。
3
As mobile phone text messages like "I CN C U" show, it is often possible to leave out a lot of data without losing much meaning.