Group 1 - The core product of the company is primarily focused on front-end wafer inspection equipment, specifically the TB1500 bright field inspection device, which has already been sold to customers and is being used in their production lines [1] Group 2 - The company has confirmed its position in the semiconductor industry, emphasizing its involvement in front-end detection rather than back-end detection equipment [1]

Group 1 - The core viewpoint of the article is that Tianzhun Technology has officially started selling its TB1500 bright field detection equipment for semiconductor wafer inspection, which is now being used in customer production lines [2] Group 2 - The company's semiconductor business primarily focuses on front-end wafer inspection equipment [2]