Treasure Hunt and Tomb Exploration

I sneaked down into the cave, and the first thing I saw was the mural. It was too old, and there were traces of earthquakes. This mural... Why is there a picture of Guanyin Bodhisattva kneeling on it? Whose relics are colorful on the ground? Why did Yang Yong, a graduate student, Gao Huan, a businessman, and the monkey walk out of the wall when they saw the shadow on the wall in the hole? Whose underground palace is this? Why can't the incense burner be taken away? Why do unexpected things always happen every time I go on a treasure hunt? The story is intertwined with suspense and the plot is confusing...