What is 中日韩?

Here's a joke (from other site)

中日韩三国足球队主教练一起来到天堂，询问上帝各自的足球队什么时候才能得世界杯冠军，上帝说：韩国需要50年。韩国教练大哭起来：我是见不到了。上帝又说：日本需要100年。日本教练大哭起来：我是见不到了。中国教练连忙问：我们呢？上帝大哭起来：我是见不到了。

On her first try, she didn't quite understand 中日韩. She translated it as "In the middle of the day, 3 ...". After I explained that they are shorthands for China, Japan and Korea, she translated the joke as follows. In her Chinese recording, she did a great job to deliver the joke.

One day three head soccer coaches from China, Japan, and Korea went to the heaven altar place together. They wanted to ask God when their soccer teams would win the world cup. God said, "Korea will take fifty years." The Korean coach started to cry waterfalls, "I'm never gonna make it!!! "Japan will take 100 years." God continued. The Japanese coach started to cry as well, "I'm never gonna make it!!!!!" The Chinese coach quickly asked, "How about us?" "I'm never going to see it!!!" God burst out, crying uncontrollably.

ps.
I found many jokes from http://www.haha365.com/ are good material for learning Chinese.