Background
Qing Yuanzi was a legendary figure who managed to create a formation of 72 swords that could allow him to kill early stage Body Intregration cultivators while being Late Spatial Tempering.
He is the creator of the Azure Essence Sword Art that Han Li inherited, the only difference being that Han Li refined them with Auric Essence and other materials such as refined crystal and glacial jade, making his swords look golden and not azure.
Granted New Azure Essence Sword Art to Han Li while he was in the Infernal River.