Prehistoric: Bind the Pangu System at the Beginning

Traveling through the prehistoric world, Lu Fan started out bound to the [Prehistoric Guardian System]. While others were competing for spiritual treasures, luck, and holy positions, he was forced to "put out fires" all over the world - in the tribulation of fierce beasts, he was busy protecting endangered species; in the fight between dragons and phoenixes, he secretly ran a school for the orphans of the three tribes; in the battle between Taoism and demons, he pulled Hongjun and Luohu to sign a peace agreement... Until one day, Hongjun held the Hongmeng Purple Qi and begged him to accept it, and Luo Hu held the Zhuxian Sword and begged him to be the boss. Lu Fan looked at the final prompt that was suddenly unlocked in the background of the system and fell into deep thought: "This system was created by the Great God Pangu before his death. Its mission is to cultivate a true guardian for the ancient world." So... I always thought that I was a time traveler, but in fact I was the "nanny" pre-ordained?