Group 1 - As of July 30, Lehman Optoelectronics' stock price closed at 7.76 yuan, down 0.21 yuan or 2.63% from the previous trading day [1] - The trading volume on that day was 175,800 hands, with a transaction amount of 137 million yuan [1] - Lehman Optoelectronics operates in the optical optoelectronics industry, focusing on the research, production, and sales of LED display products, covering specialized, commercial, and household display fields [1] Group 2 - On July 30, the company stated on its interactive platform that its LED chip packaging business is currently focused on the Micro LED large-size ultra-high-definition display field [1] - On the same day, the net outflow of main funds was 13.83 million yuan, accounting for 0.52% of the circulating market value [1]