Thousands of years ago, there was no industrial pollution. When night fell, stars in the sky were like gems set on black cloth.

Lin Luoran is in a relatively clean and tidy room in a group of low houses made of mud. She looks outside the window and sees an oasis in the earth-yellow city with so many mud houses under the stars. A higher wall encircles a higher land in the city. That is the palace of the Neo-Babylonian Empire.

"Do you mean that the test ...