During the period of the Eastern Han Dynasty in China's history, it is said, there lived in the Ruhe River a monster of plague. Whenever he appeared, there would always be someone from each family who fell ill and someone who lost his life each day. People living in this area suffered greatly from brutality of the monster.

A plague took off Huanjing's parents. He himself nearly lost his life. After his recovery Huanjing tool leave of his wife and the folks and set off determinedly seek for celestial beings and learn military art so as to eliminate the monster of plague.

Huanjing visited many famous mountains and called on lots of elder scholars. And at last he got to know that there lived in seclusion a celestial senior named Fei Changfang who possessed supernatural power that no one could match. If he went to learn from him, he could eliminate the monster of plague as easy as turning his hand over. 　

Huanjing was overjoyed to know this. He travelled across mountains and rivers and after going through all kinds of hardships and difficulties he came at last to the foot of the old mountain. He was worrying about the problem of how to find the celestial senior when a crane came flying before him. 　

The crane led him directly to the old temple in which the senior lived. The temple was surrounded with pines and cypresses of verdant green as well as surging mountain streams. However the door was made fast. Huanjing stood outside the door waiting respectfully for fear of disturbing the celestial senior. Huanjing waited respectfully for three days, the door of the temple was opened at last. Fei Changfang, with white hair and ruddy complextion, stroked his long beard and said to Huanjing with a smile, “Since you were so devoted, please come in."