Mu Guiying Command

The Liao people you mentioned are Lu Ye Yunan, the grandson of the Northern Han Dynasty. They were put down on the cliff from an early age and tortured to death by grandpa's inhumanity. They don't trust anyone. They helped Liao fight Song Jun to restore the country, and then they all fell off the cliff with Yang Paifeng. They fell in love with her and left her because of the heavy responsibility of rejuvenating the country. After the destruction of Tianmen array, they disappeared.