Zhang Z. On the Impact of Digital Transformation on Enterprise Investment Efficiency: Case Studies and Empirical Analyses Based on Midea, Gree Electric Appliances, and Lutai Group. EHSS [Internet]. 2025 Dec. 25 [cited 2026 Aug. 21];61:246-53. Available from: https://drpehss.com/index.php/ojs/article/view/38