The origin of Bingzhou?

According to legend, during the Three Kingdoms period, Wu Zhusun soon gained power, and Prince Sun Deng died of illness. Sun Quan can only choose the prince among other sons. There is a West Lake named Jingyang who asks for Sun Quan in a cloth. It is the great cause of several generations to say that it depends not only on whether the prince is virtuous but also on the talent of the emperor's grandson. He said that he had a way to try to say goodbye to the emperor Sun Xianyu, and Sun Quan ordered Jingyang to choose a good luck. It was the day when the princes took their sons into the palace, and Jingyang brought out a plate full of pearls, ivory, rhinoceros horn and other things for the little emperors and grandchildren to snatch at will. Children either catch jade or take rhinoceros horn. Only Hao, the son of Sun He, grabbed the simple book in one hand and the ribbon in the other. Sun Quan was overjoyed and made Sun He a prince. However, the other princes refused to accept it, and they made friends with their ministers and infighting, forcing Sun Quan to depose Sun He and make Sun Liang his successor. After Sun Quan's death, Sun Liang was only in power for seven years, and was later overthrown by a coup and changed Sun Xiu to emperor. After Sun Xiu's death, ministers all wanted to promote an older prince to be emperor, so they chose Sun Hao who was over 20. At this time, it is not surprising that some old ministers recall the way in which prospective parents chose their heirs.