in planned economy, the productive force was well bound within the internal spots of PPF.reform has been faciliating the economy equilibrium to move toward its fountier,resulting in a high annaul growth of gdp.what is more ,compared with as large a number of labor forces as more than 700 million ,the scale of gdp is too small to absorb them all to work .also,current labor market crying for more efficient and more liquid does not make machinism of price work well