Empirical study on industrial co-agglomeration of Chinese manufacturing Empirical study on industrial mediation of labor disputes Geographical concentration and agglomeration of Chinese manufacturing industries Empirical study on critical success factors of Six Sigma implementation in Chinese manufacturing enterprises 并列题名：Geographical concentration and agglomeration of Chinese manufacturing industries the empirical study on industrial cluster in Chaoshan 并列题名：Empirical study on industrial mediation of labor disputes