What role does the sand monk play in the journey to the west?

As the saying goes, hard work without merit, the sand monk contracted almost all the coolies. As we all know, Tang Priest belongs to the core figure. Although he has no martial arts and is sometimes a mother-in-law, he is the most important, because he is the reincarnation of the golden cicada, and he has unshakable faith. Without faith, he can't pass so many hardships. The Monkey King is the most capable of them. He wears a golden hoop all day and is responsible for the main protection role. If he meets a monster, the Monkey King will bear the brunt. As for Pig Bajie, he belongs to the reserve team. When the Monkey King couldn't cope with the monster alone, Pig Bajie played the role of supporting and moving reinforcements. In addition to lewdness, he actually has many tricks to act as a strategist. Bai, I won't talk about it here. Because he is mainly the horse in the team.