The main goal of this study is to analyze the impact of the occupational composition within French firms in the manufacturing sector. I will rely on an econometric analysis using micro-level data. In a linear empirical equation, I will use imported inputs from China as an independent variable and the share of workers across different occupations as my dependent variable. To reduce endogeneity concerns, I will use as an instrumental variable the exports of Chinese inputs to other developed countries outside the European union. In order to realize this project, I will nedd to use French firm level confidential data to be able to analyze workers adjustment mechanisms within firms and to get credible results.