Today is the Lantern Festival, let's come and guess riddles!
One day a master wrote the character 'heart' on the door. When his disciple came to visit him, he saw the character 'heart' at the door and went back. The next day, the master wrote the character 'wood' on the door, and this time his disciple went directly into the room to visit his master. Do you know the meaning of this sequence?
