Morning Introduction: Guge’s accommodation has a strict hierarchical system: on the hillside are accommodations for nobles and nobles, at the bottom of the mountain are slaves, and some caves are monks’ practice areas. With such a steep mountain wall as a barrier, climbing to the top of the mountain is more difficult than climbing to the sky. So how did the Guge people themselves go up the mountain? It turns out that the clever Guge people built many secret passages in the mountain. Certain windows-like holes in the secret passages were used for both lighting and defense. These secret passages are winding and winding, and you can go up the steps to reach the palace on the top of the mountain.