Gu Cheng said: The night gave me black eyes, but I used them to look for light. God gave me a pair of bright eyes, but my heart was covered with darkness. In my world, light is given by others, but it can also be easily taken away. Along the way, I saw many things belonging to the night. They have been pursuing the light. The light did not give them happiness, but made them suffer. The night gave them shelter, but forgot to tell them that some things will burn when they encounter the light. A dark night that can raise the sun has no light, only darkness. A day that can raise the moon has no light, only night.