How did the traditional culture of two hundred and fifty come about?

Originally from folklore. Once upon a time, there was a scholar, in order to obtain the title of sleep and sleep, study hard, but throughout his life have not been successful, even the son was not born. In his later years, the old scholar finally became disillusioned and indifferent to fame and fortune, but instead, he was blessed with a son, adding two children. Xiucai recalled the successes and failures of his life, could not help but feel a lot of emotion, so he named his two sons: one called success, one called failure. From then on, Xiu Cai was at home and had a happy life behind closed doors. One day, the scholar instructed his wife, "I'm going to the market, you are at home to urge the two sons to write, the eldest son to write 300, the youngest son to write 200." Xiucai rushed to the market after returning to ask the two sons at home how to use their skills, the old wife replied: "write is written, but not enough to achieve things, defeat is more than enough, the two are two hundred and fifty-five!"