Today, Cody helped us reviewed what we learned yesterday. That was one of the most awesome class I had, which is very funny just like watching comedy. Here, I just add some more information about North Korea. North Korea board with China, South Korea and a little of Russia. This country is totally dark at night because it's poor. Their coastlines are even invisible at night. And people can only watch the stations that the government want them to watch. And their have very few internet which is a closed domestic network.