The grandstand of the Roman-style open-air theater is fanned out on the hillside. The stage is paved with boulders, surrounded by dozens of staircases, like stars holding the moon. Even more amazing is that in the age of the sound system, which has not been invented, the theater that can accommodate 6,000 people has a natural sound effect! Just click on the palms and speak in the center in front of the stage, it can form a strong echo, and the sound can be clearly diffused, even sitting in the last row can be heard clearly. There is a passageway every 10 floors of the theater, and the entire theater can accommodate thousands of spectators.