For us, some secrets will seem heavy and will affect our health for a long time, and these secrets can't be told to others. At this time, find a tree hole to tell the secret, and people will become relaxed.

This view of tree holes comes from a fairy tale "The Emperor has donkey ears", which tells that a king has a pair of donkey ears. Every year, different hairdressers came to cut his hair, but because everyone who cut his hair could not help telling others when he saw his donkey's ears, he was killed by the king in a rage. On this day, a barber didn't want to be killed after cutting his hair. He tried not to tell anyone about it, but it was too difficult to keep the secret in his heart. He almost couldn't hold it, so he ran to the mountain and told it to a big tree hole. Suddenly feeling carefree, the barber saved his life.