What is the legend of cutting down trees in the Mid-Autumn Festival legend? Ok, add wealth value.

According to a legend about the Mid-Autumn Festival, osmanthus trees in front of the Guanghan Palace on the moon are flourishing, more than 500 feet high. There is a man who often cuts, but after each cut, the cut place closes immediately. For thousands of years, this laurel tree can never be cut down. It is said that the person who cut down trees was WU GANG, a native of Xihe in Han Dynasty. He once practiced Buddhism with the immortal, and made a mistake in heaven. The immortal demoted him to the Moon Palace, and he did this futile work every day to show his punishment. He said that he didn't pay enough attention to learning immortals. In order to temper his mind, the Emperor punished him for cutting down osmanthus trees, and promised that if he cut down osmanthus trees, he would become immortal. So WU GANG cut it down in the Cold Moon Palace day after day and year after year.