Group 1 - The company has a patent for a "lithium sulfide preparation method," which can be used as a raw material for solid-state battery electrolytes [2] - The patent is currently in the early stages of research and development, and further details can be found in the company's relevant announcements [2] - Investors inquired about the timeline for establishing solid-state battery raw material production lines, expected production capacity, and potential revenue contributions [2]