大胜达(603687.SH)：没有为宇树机器人提供外包装服务，但与核心零配件厂家建立了合作关系

Core Viewpoint - The company, Dazhengda (603687.SH), primarily engages in the research, production, printing, and sales of paper packaging products, including corrugated boxes, high-end wine packaging, and premium cigarette packaging [1] Company Operations - The company's main business includes the development and manufacturing of various paper packaging products [1] - Currently, the company does not provide outer packaging services for Yushu Robotics but has established cooperative relationships with core component manufacturers [1]