Li , Haiyan, and Wasin Phromphithakkul. 2025. “Spatial-temporal Differentiation and Convergence of Technological Innovation Efficiency in China’s Equipment Manufacturing Industry”. Nimitmai Review Journal 8 (1). Phayao, Thailand:95-109. https://so04.tci-thaijo.org/index.php/nmrj/article/view/271401.