First, his relationship with Zhao Yuan had been established under his true identity—Zhang Tie. Cui Li, on the other hand, had never had any contact with Zhao Yuan from beginning to end.
Second, Zhao Yuan possessed heaven-defying strength. As a formidable Sky Knight, he would never have been followed or set up by a Phantom Knight. Moreover, Zhao Yuan knew the predicament he and Zhang Tie faced in Great Xia, so he would never have revealed that Zhang Tie was his disciple.
Third, no one knew that Cui Li was Zhang Tie.
Fourth, when Zhao Yuan discovered the Candle Dragon Scripture, given his pride, he had not even deigned to put it away. He had simply left it untouched in that cave. Since Zhao Yuan had later left the Candle Dragon Scripture to him without fearing that it would bring him any hidden dangers, that meant Zhao Yuan had not told anyone about his discovery of the Candle Dragon Scripture. Therefore, no one else could possibly suspect any connection between him and Zhao Yuan because of the Candle Dragon Scripture he cultivated.
Fifth, Zhao Yuan alone knew that he had obtained the Candle Dragon Scripture. If anyone were to be suspicious, it would be Zhao Yuan suspecting a connection between Cui Li and Zhang Tie. It would never be anyone else suspecting a connection between Cui Li and Zhao Yuan.
Sixth, Zhao Yuan's secret art of Purgatory Reincarnation had shaken both the human and Devil Race realms. Apart from that, Zhao Yuan was also a master-level alchemist in Great Xia. Of the abilities he had inherited from Zhao Yuan, only Purgatory Reincarnation was known. Its defining feature was absorbing and refining others' chakras for one's own use, rapidly condensing chakras. He had advanced to Earth Knight within two years in