As April comes, the weather is getting warmer and warmer. Xiao Shan resumed running this week. I remember the first time I ran with Xiao Shan, I was really surprised. The endurance of hill running is really very strong, and his speed is improving all the time. Koyama started out doing a lap in 15 minutes, and two weeks later he was doing a lap in eight and a half minutes, almost twice as fast as he had done before. It was a really fast improvement.