万润科技：公司主要从事LED、半导体存储器新一代信息技术业务、综合能源服务业务和广告传媒业务

Group 1 - The company, Wanrun Technology, primarily engages in LED, semiconductor memory, new generation information technology, comprehensive energy services, and advertising media businesses [1] - Key products in the LED segment include surface-mounted and through-hole light source products, as well as lighting application products [1] - In the semiconductor memory segment, the main products consist of solid-state drives, embedded storage products, and DDR memory products [1]