Dear teachers and schoolmates, May I have your attention please? I have an announcement to make. In order to help us learn more about China Spaceflight, Professor Li Bo from Peking University will give us a lecture. He will talk about the background of the development of China Spaceflight as well as its process. Besides,astronauts and something about the series of Shenzhou Spaceships will also be introduced. The lecture will be held on Thursday, the fifth of January and it will begin at 2:30 pm in the Lecture Hall of our school. Anyone who's interested in the topic is welcome to attend the lecture. Don't forget to be on time. That's all. Thanks for your attention.