According to legend, there was a man named WU GANG in the Moon Palace, who was from Xihe, Han Dynasty. He once followed the gods to heaven, but he made a mistake. The immortal banished him to the Moon Palace and cut off the laurel trees in front of the Moon Palace every day as punishment. This osmanthus tree is flourishing, more than 500 feet high. Every time it is cut, the cut place will be closed immediately. Li Bai wrote in the poem "To Cui Hu Si Wen Kun Ji": "If you want to stay in the middle of the month, you will be rewarded if you are cold."