The paper aims to provide a representation, as rich and complete as possible, of the Chinese labour market, both in terms of stock and flow, despite the fact that the statistical information is still rather poor and often inconsistent. It does then document the increasing differences in the level and trends of the main labour market variables at the provincial level. In order to reach a deeper comprehension of the dynamic of the Chinese labour market, the paper analyses two other extremely relevant phenomena: the so called “floating population” and the labour shortages that are more and more frequently affecting the coastal regions. After having provided a demographic background to the Lewis model of development with unlimited supply of labour, the paper shows in which periods China has been obliged to accumulate a large labour surplus, mainly in the agricultural sector, and in which periods and through which mechanisms, including ageing and internal migration, the process of deaccumulation has taken place. More specifically, the paper shows how up to now internal migrations have provided urban areas and coastal regions with an unlimited supply of labour, a factor that has played a major role in boosting the Chinese economic development and determining its typology. In order to reach this result, simple demographic tools have been utilized to estimate the net migration balance of each province and in each province of rural and urban areas, and therefore to define areas of departures and areas of arrival, information not provided by the literature on the floating population. Finally the paper provides a rough estimate of the disguised unemployment in agriculture and of its geographical distribution. After assessing which percentage can represent a possible supply of labour for the modern sector, it will be maintained that China not only is very close to the Lewis turning point (a situation that has already been reached in many coastal areas), but is going to become the world biggest importer of labour. In order to provide its population with living standards comparable to that of the western world, in a reasonable time interval, China needs to continue to grow at an extremely high rate. This will require the capacity to deal with a series of structural problems. Limiting our concerns to the labour market, that is characterized by increasing complexity and regional differentiation, high priority should be given to improve the collection, analysis and dissemination of labour market data; to abolish the one child policy that is totally obsolete in a situation that will be soon characterized by a structural lack of labour supply; to give to the Chinese citizens the right to freely move and change residence, while rapidly regularizing the existing floating population; to raise the legal age of retirement; to plan and implement a structure of t entries in vocational courses and higher educational paths coherent with the expected structure of the labour demand in terms of flows by occupation; to strengthen the Employment service system in order to improve skills matching at the local level, and facilitate the correct allocation of human resources over the national territory, in order to minimize the human and economic costs of future unavoidable internal migrations.