Urban background: The story takes place in the second-tier city "Ningzhou", which not only has the modern prosperity of the CBD with high-rise buildings, but also retains the smoky streets such as "Qingwu Lane" in the old city - Qingwu Lane is located in the core of the old city, flanked by old brick-walled houses in the Republic of China style. Due to lagging behind in planning, Qingwu Alley has been included in the "Alternative List for Old City Renovation" in recent years. However, most of the residents are old residents who have deep feelings for the streets and alleys, so there is considerable resistance to renovation.
