Cultivation does not originate from ancient inheritance, but the special energy - "Mortal Vein" bred by the long-term integration of the city's "popularity, information flow, and architectural pattern".
The mortal veins are distributed in the "active nodes" of the city: old neighborhoods, century-old bookstores, squares with large flow of people, and buildings carrying collective memory (such as old bell towers and ancient bridges). The more humane and historical the place, the richer the mortal veins.
People who can perceive and use mortal pulses are called "pulse guides". The practice of pulse guides does not rely on elixirs or magic weapons, but on "understanding the city" - observing the flow of people, listening to neighborhood stories, and maintaining the order of nodes, so as to nourish one's own "pulse" and break through realms (such as: perception realm → channel connection realm → city integration realm).
