It is no exaggeration to say that ginseng fruit trees are the lifeblood of Taoist Zhenyuanzi. At first, Taoist Zhenyuanzi was just a young monk, and he accidentally got this Millennium ginseng fruit tree, which can improve people's cultivation and increase their mana. This makes Zhen Yuanzi a senior figure, so if the ginseng fruit tree is destroyed, Zhen Yuanzi's reaction will be fierce, and even the master and apprentice will be dismembered, which will not solve the hatred in his heart.
Why did Master Zhenyuanzi let go of the four masters and apprentices so easily instead of killing the enemy immediately? Later, Guanyin Bodhisattva appeared, revived the ginseng fruit tree, and solved the doubts of the audience. Tang Priest and his disciples had to go through 81 difficulties to get Buddhist scriptures, so they set up various checkpoints along the way, and Zhenyuanzi probably knew the purpose of Guanyin, just to test the Monkey King. Moreover, Zhenyuanzi also knew that Guanyin Bodhisattva had a way to revive the thousand-year-old ginseng fruit tree, so he didn't go on the rampage and killed all four of them at once.
In this way, the doubt is solved. Perhaps both the Buddha and the Bodhisattva in the Western Heaven know that the monsters and ghosts encountered by the four monks and apprentices in the Tang Dynasty are just checkpoints set by them in advance, and they have no worries about their lives or any harm, but only tests their various abilities.