According to Youyang Za Zu (Assorted Notes from Youyang) by Duan Chengshi (d. 863), the osmanthus tree in the moon is 5000 feet tall, and Wu Gang, the latecomer on the moon palace team, is a native of Xihe. He dreams of becoming an immortal, but while brewing up elixir he lazily falls asleep.
根據段成式《酉陽雜俎》記載，月中桂樹高達五百丈，而這位最晚報到的月宮成員吳剛，原是西河人士，夢想成仙，卻在煉丹時偷懶睡著了，被天神發現後，命他上月宮伐桂。