Another legend goes that there is a huge verdant osmanthus tree, as tall as 500 meters, in front of the Guanghan Palace( Wide and Cold Palace). Under the intertwined tree branches there is a man who is wielding an ax chopping it.
But this tree has magical power and the cut pointing can immediately recovers every time. The endless chopping and then recovering goes on for thousands of years and the tree still grows verdantly and heavily sheltered the palace beside. The man was said from the Han Dynasty and called Wugang. He once followed an immortal to practice immortal skills. Wu successfully learnt the skill and flew to the heaven. Soon afterward, he made a serious mistake and was demoted to the Moon Palace (Guanghangong) to do this painful and endless task.