She is human.
Yu Liang himself is also human, so he guessed that he might not be able to do the same. It may take him several years to perform the simplest two-dimensional unfolding, and his combat power is worrying.
If this is the case, it might as well let the human-serpent in the three-eyed people's base learn to unfold in two dimensions. It is the product of a flesh-and-blood civilization and has patience to study, thus resolving the problem easily.
The "clumsy bird" does not necessarily have to fly first to achieve its goal. It can also choose to give birth to a small bird, train it heavily, while the bird itself can just sleep comfortably.
Just right, the problem of the golden pupils is also solved.
Yu Liang has two golden pupils at hand, one is Xu Cixi's, which he will return to her later; the other is the number 1 of the three-eyed people, which he can directly throw to the human-serpent for use.