What is the purpose of the characters portrayed by the author of Journey to the West as well as a character analysis of the four main characters?

The Monkey King, also known as the Monkey King and the Great Sage of Qi Tian. The Monkey King is a stone monkey who was born from a rock in Mount Huaguo in the Aorai Kingdom in the Eastern Prefecture of China. In the flower and fruit mountain occupies the mountain as the king for three and a half hundred years. After eight or nine years, trekking through the mountains, in the Western Niuga Island, Lingtai Square Inch Mountain to worship the Bodhi master as a teacher, learned the skills of seventy-two changes. Thereafter, Sun Wukong caused havoc in the Heavenly Palace and crowned himself as the Great Sage of Qi Tian, who was suppressed by Buddha Rulai under the Five Elements Mountain and was unable to act. Five hundred years later, the Longevity Monk went to the West to collect scriptures, and passed by the Five Elements Mountain, and removed the talisman, before saving the Monkey King. Sun Wukong was so grateful that he was instructed by the Bodhisattva Guanyin to take the Longevity Monk as his master, and went to the West to fetch scriptures with him. On the way to fetch scriptures, Sun Wukong subdues demons and eliminates monsters, and makes many miraculous achievements. However, he is misunderstood and expelled by his master, Tang Monk, twice and thrice. Finally, the four masters and disciples arrived at the Leiyin Temple in the west and obtained the real scriptures. The Monkey King was awarded the title of "The Buddha of Victory". The Monkey King is smart, lively, brave, loyal and avenging evil, and has become the embodiment of wit and bravery in Chinese culture. In a young Chinese boy, the Monkey King could easily become his idol.

The Tang Monk, a fictional character in novels, is different from the real historical figure, the Venerable Xuanzang. The Tang Monk in the novel, common surname Chen, nicknamed Jiangliu, Dharma name Xuanzang. He is the posthumous son, since childhood in the temple monk, grew up. Due to the tragic and bizarre experiences of his parents, he eventually migrated to the capital city to settle and practice in a famous monastery. The Tang monk was diligent, sensitive and highly enlightened, and stood out among the temple monks. Eventually, he was chosen by the Emperor of the Tang Dynasty to travel to the West to collect scriptures. On the way to fetch scriptures, Tang Monk successively took in three disciples, Sun Wukong, Piggy, and Sha Monk. Name Venerable Xuanzang, No. Sanzang, common surname Chen. Originally a golden cicada reborn before the Buddha. In the biochemical temple monk.

Pig Bajie was originally the heavenly palace in the canopy marshal, because of molestation of Chang'e, was punished down to earth, but mistakenly cast a pig's fetus, grew into the shape of a pig-faced person. He seized the women of the people in Gaolaozhuang. Piggy's weapon is the nine-toothed nail palladium. Piggy only knows thirty-six changes.

Sha Heshang was originally a rolled-up general in the Heavenly Palace, and was relegated to earth as a demon on the banks of the Quicksand River because he angered the Queen Mother by breaking a glazed marigold at the Peach Banquet, and was later subdued by the Tang Monk's masters and disciples.