sentences:  Although there are 320 million laborers still in agriculture, only 20 million have the potential to migrate to cities, pushing the country to a point at which "the excess labor in the subsistence sector is fully absorbed into the modern sector, and where further capital accumulation begins to increase wages" - pointing to a Lewis scenario.Labor shortage is not yet a major problem in China, as there are still governmental measures to free up the pool of rural labor, such as the further easing of the hukou, or household registration, system.“However, these are unlikely to reverse the trend of increasing labor costs".