In this world, luck can be "traded" in special ways:
Feng Shui layout: the most common way to influence luck by changing the environment
Fate Grafting: Transferring one person's bad luck to another person (requires the other person's consent or special conditions)
Luck sharing: Multiple people form a "luck alliance" to share good luck, but also share misfortune.
Reversal of destiny: The most dangerous way to forcefully change destiny, but it will lead to divine punishment.
