That Tang Ye is a New Human of a different species is no longer a matter for "suspicion". And these different New Humans have many evolutionary paths. When they reach Level 2, certain other parts of their bodies will undergo changes, not just their height.
Take Sen Kong from the Dragon Group within Huachen Jiangtian as an example, he evolved two bone blades from his back. They serve like two additional hands when he's fighting! The evolution of zombies is fantastical and bewildering, and so it is for New Humans.
Some can take back the aura on their bodies, or control the contraction of their skeletons to achieve the effect of the clavicle-locking skill!
But no matter how they may evolve, they won't become unrecognizable like zombies, to the point that even their mothers wouldn't recognize them!
