I remember a story about a man who went to tell the fortune of his eldest son and youngest son. The fortune teller said that a person's eldest son can be a big official, and his youngest son can only farm. The man went home and told his eldest son and youngest son the result of fortune telling. The eldest son was very happy after listening to it. He never thought about making progress and playing all day. Hearing this, the youngest son studies harder and harder every day. A few years later, the eldest son became a farmer and the youngest son became a county magistrate: therefore, fortune-telling is not credible.