When Han Yi landed deep in the Green Shu Mountain Range, behind Mt. Xuan Dan, at the secret land of the sect, he saw an Immortal Puppet standing in the secret area, close to the core region.
If a low-level cultivator saw this Immortal Puppet, they could only mistake it for a true Immortal, for whether through appearance or the sensation of Divine Consciousness, it was difficult to discern that the other was an Immortal Puppet and not a True Immortal.
But Han Yi, having reached the rank of Profound Immortal, could naturally identify the identity of the Immortal Puppet with a sweep of his Immortal Sense.
The reason Lian Tingxi knew the other was an Immortal Puppet was because this True Immortal had easily entered the secret land before, and had also used his Immortal Sense to inform Lian Tingxi of his identity.