The Monkey King has been gone for 500 years. Why didn't anyone attack Huaguo Mountain?

I believe that friends who have seen Journey to the West must be familiar with it. The Monkey King lived in Huaguoshan until the Heaven Palace made a scene. The reason why Huaguo Mountain can be remembered by the Monkey King is mainly because it is a sacred place of mountains and rivers, with abundant resources and pleasant climate. However, after that, the Monkey King will escort Tang Priest to fetch Buddhist scriptures from the West. So after he left Huaguoshan, did anyone still miss Huaguoshan? Who was guarding this place at that time?

In the original work, there is a very detailed historical record of Guo Huashan. According to records, this is a treasure trove of geomantic omen. After the Monkey King occupied this place, he led many monkeys to eat, drink and have fun on the mountain. However, after the Monkey King left, no goblin dared to take it. It turned out that after the Monkey King left, this place was conveniently guarded by two old monkeys around 2000 years old. These two monkeys have been following the Monkey King for many years.

One of the monkeys is a well-informed straight-backed monkey, and the other is a clever red horse monkey. Buddha once introduced the strength of these two monkeys. He once said that there are four kinds of mixed monkeys, which are not in the 10 type, and this red horse monkey ranks second among them, second only to the monkey king. It knows that yin and yang have reincarnation and can be like people.

First of all, their boss, the Monkey King, robbed the golden hoop and seventy-two changes, which could make a scene in heaven. These two monkeys can not only prolong life, but also know some other spells. You know, the reason why the Monkey King went to Huaguoshan at that time was mainly to find a way to stay young, and these two monkeys have lived for more than 2,000 years, and their strength and experience should not be underestimated, so this is why the Monkey King is not in Huaguoshan, and no one dares to infringe.