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.
诸如“I CN C U”这样的手机短信，通常可以省略大量数据而不会失去意义。
2
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。
3
The CN field usually contains the server or queue manager name.