The Path of Producer Services Promoting China’s Manufacturing Structure Upgrade: An Empirical Study Based on Structural Equation Model. Academic Journal of Interdisciplinary Studies, [S. l.], v. 2, n. 9, p. 135, 2013. Disponível em: https://www.richtmann.org/journal/index.php/ajis/article/view/826.. Acesso em: 17 apr. 2025.