The new metro line is finally ready. The construction was finished in time. Now, we have to check out all tunnels and make sure everything's fine. Your task is the yellow line C. You were almost done when you saw someone running on the rails. Some kids must have sneaked in and are playing around. It's very dangerous, so go after them and send them out. Be sure to seal the door they used to get in or the same thing will happen in the future again and again. Let's go, they're already out of sight. Luckily, there's no test train due today.
November 2, 2015