In Lingnan at the end of the Tang Dynasty, what a county magistrate brought with him was not poetry and gunpowder, but a new set of rules that could operate in troubled times. It is not a cool article, it is very hard-core, based on in-depth historical review, relying on data, rules, and the precision of people's hearts to survive; and the vested interests of the old world are preparing to swallow him to his bones.
