Going to Mu Cang Chai, stop at the back of Khau Pha pass to see the vast Cao Pha valley in the color of rice, surrounded by mountains on all sides, majestic and magnificent mountain ranges as the meaning of the name Khau Pha itself - "Heavenly Horn". Standing from the side of the pass, following the line of sight straight ahead, saw a path like a thin thread stretching straight up to the sky. That far away place is a small village called Lim Mong.