The sun and the moon rise in the east (东方) and go down in the west (西方). At noon, the sun is high in the sky, the shadow is short. In the morning and evening, the sun is low (低的), the shadow is long. When (当.....的时候) the sun rises, it is daytime (白天). When the sun goes down, it is night. At night, sometimes (有时候) you can see the round moon in the clear sky. Many Chinese people like the moon. Many poets (诗人) write poems (诗) about the moon. Now the Chang'e-4 Lunar Probe (嫦娥四号月球探测器) is on the moon. It tells us many things about the moon. People can learn a lot about the moon.