Who is the sacred Liu Er macaque in The Journey to the West, which can make Guanyin and other immortals unrecognizable?

Liu Er's macaque is actually the Monkey King's second heart, which can be said to be a part of the Monkey King and another miniature. In fact, Liu Er's macaque is also a part of the Monkey King's heart, and it is also a very real part, which can be said to be a part of his personality.

In the Journey to the West, only the Tathagata knows the true identity of Liu Er's macaque, and other immortals and monsters, including Guanyin, don't know who Liu Er's macaque really is. In fact, the reason why we don't tell the true identity of Liu Er's macaque is to let the Monkey King unite with this Zen master and his entourage, and don't give up halfway, otherwise the impact will be very great.

There is a very important evidence that Liu Er's macaque is the Monkey King, and that is the hoop curse. Because there are strict relative spells in the hoops, others won't have the same spells as the Monkey King. Since it can limit the effectiveness of the Monkey King's spell, it means that Liu Er's macaque is the Monkey King himself.

Even if there is a replica of the Monkey King, it is impossible to react with him at the same time. Because Liu Er's macaque shouldn't know the Monkey King's inner thoughts, but he can think and act synchronously with the Monkey King, and there is no pause and thinking in the process of imitation, which is enough to prove that they are actually one. Just because of personality and other reasons, some inner worlds of Liu Er Macaque and the Monkey King are different.

In fact, the Tathagata is thinking about the Monkey King and their journey of learning from the scriptures. After all, Liu Er's macaque also beat Tang Yan with a stick. If he knew that Liu Er's macaque was the Monkey King, their journey would be more difficult.