The richest citizens of Xin Shi can do anything they want, whenever they want to.  At any time of day, they can sunbathe on the sunny side, and then cross the line to see a fireworks display in nighttime.  They can ski on bright warm waters, or down dark frozen mountains.  It’s amazing the choices they have on that world.  All because it is tide-locked to Alpha Centauri B, one face always to the sun and one always away.  It is the jewel of the Chinese Empire.