联赢激光：目前全固态电池处于研发阶段，公司已经为两家行业头部客户的中试线提供了设备

Group 1 - The core viewpoint of the article is that Lianying Laser (688518.SH) is currently in the research and development stage of all-solid-state batteries and is actively collaborating with leading battery companies for equipment development [1] Group 2 - The company has provided equipment for pilot lines to two leading industry clients [1] - The company is committed to supporting leading battery companies in the research and development of solid-state battery equipment [1]