Zhou Tian had absolutely no interest in those ghosts unless they could be used to feed the giant trees. If it wasn't for their use as feed, Zhou Tian would have found the ghosts completely worthless. Consequently, once he lured a few ghosts out, Zhou Tian would avoid spending too much time dealing with them.
Zhou Tian paid little attention to the ghosts. Upon spotting them, he immediately turned and retraced his steps along the path he had previously taken.
The ghosts, tracking Zhou Tian's energy, paid no heed to whether they were being led into dangerous territory. Instead, they instinctively followed Zhou Tian, floating continually behind him.
Eventually, under Zhou Tian's guidance, a group of ghosts followed him once more into the treeless area.