Shen Wan San is a man of nabobism at the end of the Yuan Dynasty and at the beginning of the Ming Dynasty. According to the legend, he was a fisherman on sides of Qin and Huai River. One day, when Shen Wan San saw one person catching a bag of frogs and preparing to eat them, he was kind enough to buy the frogs and put them into a pond in the vicinity. In the evening, Shen Wan San were suddenly awoken by noisy voice of the frogs. He got out and had a look only to find that the frogs released by him were surrounding a clay pot, hence, he took the clay pot into his house.

Once, his wife accidentally dropped a small piece of silver in the clay pot. To her surprise, it soon became a basin of silver. Until then did they knew that this is a basin of collecting treasures, therefore, Shen Wan San became very rich.