The only reason was that Mengdie had told Zhu Fei that from the moment Long Ba came to his side, Zhu Fei possessed the right to issue any command to Long Ba.
As long as Zhu Fei didn't order Long Ba to commit suicide or engage in acts such as ruining his own cultivation, which were utterly without a bottom line, Long Ba must unconditionally carry out any of Zhu Fei's directives.
Furthermore, in the Jade Scroll, Mengdie also imparted to Zhu Fei a Forbidden Technique of Dragon Control.
According to what Mengdie herself said, this magic was a lost Forbidden Technique from the ancient times, particularly effective against the Dragon Clan.
Currently, across all the Cultivation Plane, including the Immortal Realm, apart from Mengdie herself, Zhu Fei was the second person to master this Forbidden Technique.
If later, Long Ba did not obediently follow the arrangement, then Zhu Fei could use this Forbidden Technique to make Long Ba submit.
