Non-traditional "aura" is a special energy condensed from the natural aura, humanistic memory, and the sense of time of old objects in the city. It is invisible but can be sensed, guided, and stored.
The aura is scattered: bluestone slabs in old alleys, century-old trees, ancestral jewelry, ancient books in old bookstores, and even the collective memories of residents in the old city may all have aura attached to them; new urban areas have more steel and concrete, less humanistic accumulation, and the aura is extremely thin.
Characteristics of aura: gentleness and "memory". The more sincere emotions the attached items/places carry (such as bracelets passed down from ancestors and grandchildren, old stations that have witnessed countless partings and reunions), the richer the aura; forcible plunder will cause the aura to "dissipate" and may even backfire on the plunderers.
