Why is there no Bajie's name on the book of life and death?

Pig Bajie's position in Journey to the West is very special. According to the framework of the story of Journey to the West, the reincarnation, birth and death of the six sentient beings all need to go through the underworld, and then decide the destination behind them. For example, after the death of Emperor Taizong, he wandered to the underworld. Fortunately, Emperor Taizong had some social connections in the underworld, so he was able to "muddle through". The Monkey King's immortal bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi bodhi.

Fortunately, the Monkey King's stick was too powerful, and the hell was overwhelmed, so he had to save the Monkey King. What is special about Pig Bajie is that although he also violated the royal law of the Jade Emperor, the Monkey King, Pig Bajie and Friar Sand were treated differently: because of the Monkey King's strength, the hell couldn't stand it, so the Jade Emperor beheaded him first, and then let the old gentleman in the Imperial Palace throw the Monkey King into the blast furnace to burn, but the Monkey King was too skilled to burn him, and the Jade Emperor had nothing to do with him. Although the sand monk also violated the jade emperor's law, the jade emperor only drove the sand monk to Liushahe and let him serve his sentence there.

Pig Bajie was reincarnated by the Jade Emperor. The so-called reincarnation means that this life has come to an end and started the next life. In the process of reincarnation, Pig Bajie finally got the image of Pig Bajie because he cast a pig fetus. To sum up, the Jade Emperor wanted to sentence the Monkey King to death, but he couldn't execute it. He was sentenced to death for Pig Bajie and successfully executed it. The reason why he was successfully executed was that Tian Pengyuan Shuai and Zhu Bajie had completely different identities and bodies, but he sentenced the sand monk to life imprisonment.

However, it is strange that when Marshal Tian Peng was reincarnated as Pig Bajie, he did not go through the underworld-in other words, there was no name of Pig Bajie in the book of life and death, which made it difficult for Pig Bajie to go through the reincarnation formalities, so there was a procedural error, which led to Pig Bajie becoming a pig. What is the reason?

This should be related to the status of the jade emperor. At first, the celestial order was chaotic. The Arctic Emperor once ruled the three realms of this country, and Tian Pengyuan Shuai was one of the four gods around the Arctic Emperor. Later, considering that the order of the Three Realms was too chaotic, the Arctic Emperor could not effectively manage the Three Realms, so the Buddha appointed the Jade Emperor to manage the Three Realms. At the beginning of his reign, the Jade Emperor relied on four gods, including Tian Peng and Yuan Shuai, to assist him. Therefore, Tian Pengyuan Shuai's position is too lofty, which leads to his name not being on the book of life and death. However, with the jade emperor firmly seated, the respect for these four generals began to fade.