伟时电子：公司主要从事背光显示模组、液晶显示模组、智能显示组件等产品研发、生产、销售

Group 1 - The company, Weishi Electronics (605218), primarily engages in the research, production, and sales of backlight display modules, liquid crystal display modules, and smart display components [1] - The specific operational conditions and sales models should be referenced in the company's periodic reports disclosed on the Shanghai Stock Exchange website [1]