万润股份：公司开发的固态电池电解质的关键上游材料硫化锂目前正在准备中试线建设工作

Group 1 - The company has completed the small-scale development of lithium sulfide, a key upstream material for solid-state battery electrolytes [2] - The company is currently preparing for the construction of a pilot production line [2] - Specific customer information related to business cooperation is kept confidential due to business confidentiality requirements [2]