How to divide the foreign population and the local population?

Generally speaking, floating population refers to those temporary population movements, but under the current circumstances, the commonly used concept of "floating population" includes all population movements that have not gone through the formalities of "household registration transfer", no matter whether this movement is short-term or long-term. According to the data, there are actually two types of rapidly increasing population movements at present: one is urban functional floating population, which increases with the economic development and their stay in cities is generally short. The flow direction of this kind of floating population is determined by urban function and urban radiation range, and its temporal and spatial distribution is relatively balanced; The other category is the labor force that enters the city to look for job opportunities. This kind of "floating population" is large in scale, stays in cities for a long time, and the mobility is relatively concentrated, which causes great social shocks. The latter is usually called "temporary population" or "foreign population" according to the household registration status. Because this special group conforms to the basic characteristics of population migration in demographic research, they are also regarded as a special form of migration, that is, "informal migration" compared with "planned migration", and their difference from planned migration is mainly reflected in their household registration status. Because hukou still plays a fundamental role in urban social and economic life, "informal floating population" cannot enjoy the same opportunities and rights as "regular" urban residents to obtain means of subsistence and means of production, thus forming immigrant groups with different hukou status in employment opportunities, industry and occupation mobility, welfare and social security.

Do you want a concise definition? Such a question is difficult to answer. You can refer to the definition of floating population above to define the floating population. In other words, the main basis for the distinction is whether the household registration status is consistent with the current residence.