华塑科技：公司向杭州宇树采购过少量机器狗用于数据中心运维服务，但长期的业务合作关系尚未建立

Group 1 - The company has engaged in a minor procurement of robotic dogs from Hangzhou Yushu Robotics for data center operation and maintenance services [2] - There is currently no established long-term business partnership between the company and Hangzhou Yushu Robotics [2]