During the Western Tsin dynasty, Chang Chu wrote in Hua Yang Kuo Chih that a dragon skeleton was found in Wucheng County in Sichuan. He described the following story: "The dragon flew up above the mountains until he came to hit the gates of heaven. The gates were closed and he couldn't get in, so he fell to earth in the place where his bones were dug up.
在西晉時代常璩所撰寫的＜華陽國志＞中，就記載四川五城縣出龍骨，並描述了一則故事：「龍升其山，值天門閉，不達，墜死於此，後沒地中，故掘取得龍骨。」