Please tell a humorous story and illustrate that humor is conducive to the development of creativity.

The son of a rich family went to take an exam, and his father gave him a test in advance. He got good grades and thought he would be admitted, but he didn't expect to be included.

There is no son's name in the world. Father hurried to the county magistrate for trial. The magistrate turned the volume to see that there was a faint fog on it, but

I can't see any words.

As soon as dad got home, he scolded, "Why is your paper so ugly?"

My son cried and said, "No one grinds ink for me in the examination room, so I have to dip my pen in water and write on the inkstone."