联赢激光(688518.SH)：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 point of the article is that Lianying Laser (688518.SH) is currently in the research and development stage of all-solid-state batteries and has provided equipment for pilot lines to two leading industry clients [1] - The company is actively collaborating with leading battery companies to conduct research and development on solid-state battery equipment [1]