请简述西游记的故事情节，并要求将其概括为100个字以内，分两段，每段首句以首字母大写的形式来写，并格式化为markdown。
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 Journey to the West, or Xiyouji, is one of the Four Great Classical Novels of Chinese literature. Set in the Tang Dynasty, it revolves around the monk Xuanzang's quest to obtain sacred Buddhist scriptures from the Western Regions. Accompanied by his three disciples—Sun Wukong (the Monkey King), Zhu Bajie (Pig), and Sha Seng (Sandy)—Xuanzang faces numerous trials and tribulations, encountering and subduing various monsters and demons.
 Throughout their journey, the four pilgrims undergo eighty-one calamities that test their resolve and faith, each calamity highlighting the virtues of perseverance, wisdom, and compassion. Ultimately, they achieve enlightenment and return the scriptures to China, contributing to the spread of Buddhism. The novel, rich in symbolism and allegory, is a profound exploration of spiritual growth and the triumph of good over evil.
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However, to strictly comply with the 100-word limit and the two-paragraph structure, here is the revised version:

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 Journey to the West is a legendary tale about the pilgrimage of the Buddhist monk Xuanzang and his three protectors—Sun Wukong, Zhu Bajie, and Sha Seng—to the West to acquire Buddhist scriptures. 
 Overcoming eighty-one calamities and diverse challenges, they demonstrate perseverance, courage, and the importance of teamwork, ultimately achieving enlightenment and fulfilling their sacred mission.
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