## Human World·Background Introduction
In ancient times, the human emperor Xuanyuan Huangdi refined the three magical weapons of heaven, earth and man to guard the human world. The demon god Chi You rebelled, and the Yellow Emperor led the colorful fairy feather phoenix and other mythical beasts to conquer. Although Chi You was defeated, both heaven and earth weapons were destroyed, and only the humanistic Holy Emperor Sword was passed down from generation to generation by the Xuanyuan clan.
Thousands of years ago, the demon clan rebelled. The two demon saints Zhu Jiuyin and Kui Niu led their armies to attack the human world. Saint Xuanyuan broke out with the blood of the Human Emperor and defeated the two saints with the Holy Emperor Sword alone, causing the divine weapon to shatter. Before his death, Saint Xuanyuan set up a barrier in the East China Sea, demarcated the boundaries between the two realms, and set rules: Monsters were not allowed to cross the border, and any offenders would be killed.
After the war, the human race established the "Three Mountains and Five Mountains Alliance", which stipulated that those who have reached the golden body level must go to the East China Sea defense line to cultivate for three years to resist the invasion of the demon clan. For thousands of years, the two worlds have been in constant dispute, but the two saints of the demon clan have not recovered from their serious injuries, and the world has temporarily found peace.
The ancestors of the Chen family once fought with the Yellow Emperor Xuanyuan. The bird-shaped boxing technique in his "Five-Animal Boxing Manual" was learned from watching the moves of the five-color fairy feather phoenix. The fire phoenix soul took away not only Chen Heng, but also a dusty bloodline.
Now, the news of the appearance of the ancient immortal weapon Kunwu Sword breaks the peace. The human race forces are ready to move, and the demon race is also sneaking in secretly, hoping to obtain the immortal weapon.
The storm is about to rise and the rain is about to come.
But our story must start slowly from a small place called Fengxian Town on the border of Daxia Kingdom, from a huge stone falling from the sky, a fluttering fire phoenix soul, and from two children embarking on the road to school.
