润建股份参股成立广东润建充换电科技服务有限公司，持股比例65%

Group 1 - Guangdong Runjian Charging Technology Service Co., Ltd. has been established with a registered capital of 10 million yuan [1] - The company is involved in various services including technology development, consulting, and promotion related to electric vehicle charging infrastructure [1] - The ownership structure includes Runjian Co., Hainan Yige Enterprise Management Partnership, and Wei Kewan [1]