I analyze the influence of Chinese internal migration on the local labor market outcomes. In this chapter, both linear and quadratic equations are estimated to explore a comprehensive relationship between migrant share and native workers' wages in a city. My findings are twofold. In the ordinary least square regression model, every 10% increase in immigrants would lead to a 5.67% decrease in local labor wages. However, in the non-linear model a turning point is observed. The average wage level decreases when the migrant share is lower than 27.82%, while increases with the migrant share larger than 27.82% complementary, by IV regression.