This Minister of Justice Has a Gold Belt

When the cataclysm occurs, the era of human prosperity is no longer there. People work in separate camps and fight each other amid suspicion and prisoner's dilemma. As a result, technology declines and civilizational conventions fail. ... One day, the Bai'an Chamber of Commerce was established, and a reporter asked their minister of justice, Xu You, a rather pointed question. "After losing its central authority, the law is like waste paper. What should you do if someone violates your contract." "Well... There are many ways to do this." "I personally recommend adding less salt and more cumin, and then pairing it with our chamber of commerce's new mushroom sauce!" (Farming wasteland science fiction)