There are two major clans in the heaven, Bailangxi and Yalendao. The two clans are feuding. Each dominates the east and west of the heaven. There is a pure land at the junction of them, called Green (lù)ye.
It is said that tens of thousands of years ago, Bailangxi's saintly private partner Yalengdao was secretly involved in the incident. The two stole the parchment that recorded all the skills of the two tribes and fled to Luye. When the two armies were pressed and desperate, they had no choice but to destroy the parchment in public. The parchment was destroyed and all their skills were lost. The two tribes were furious and wanted to kill him. The two claimed to remember all the contents of the parchment scroll. If the two tribes no longer pursue the matter of private marriage, they will swear to the gods to reveal all their skills, study with concentration, and teach their descendants never to leave Luye. They will teach the skills of these two tribes for generations to atone for their sins. If they leave Luye, they will be punished by being destroyed in ashes. The gods dropped flaming water, and the two drank it, endured the pain of forty-nine days of bone eclipse, and lost the dark bones possessed by the Bailangxi and Yalendao tribesmen. They and their descendants would not be able to leave the protection of the smoke of law that could only be found in the Green Ye Realm.
Tens of thousands of years have passed, and the authenticity of the legend is unknown, but the tribesmen of Bailangxi and Yalendao are indeed born to learn the art of Luye, and the tribesmen of Luye are indeed imprisoned in this land forever, unable to take a step out.