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Group 1 - The core viewpoint of the news is that Xiamen Youxun Chip Co., Ltd. is set to debut on the Sci-Tech Innovation Board on September 19, 2025, as a leading manufacturer in the optical communication sector in China [1] - Youxun specializes in the research, design, and sales of optical communication front-end transceiver chips, which are critical components in optical modules and significantly impact the performance and reliability of optical communication systems [1][2] - The company has achieved breakthroughs in domestic technology in key areas such as transceiver integration and high-speed modulation, and has a complete core technology system in optical communication chip design [2] Group 2 - Youxun's revenue for the years 2022 to 2024 was reported as 229 million yuan, 313 million yuan, and 411 million yuan, respectively, with corresponding net profits of approximately 81.4 million yuan, 72.1 million yuan, and 77.9 million yuan [2] - The revenue from optical communication transceiver chips for the same years was approximately 292.8 million yuan, 272.7 million yuan, and 340.3 million yuan, accounting for 86.72%, 87.15%, and 82.92% of the main business revenue, respectively [2] - In 2023, the revenue from optical communication transceiver chips decreased by approximately 20 million yuan, a decline of 6.84% year-on-year, primarily due to a reduction in average sales price and decreased procurement from downstream customers [3] - In 2024, the revenue from optical communication transceiver chips is expected to increase by approximately 67.6 million yuan, a rise of 24.78% year-on-year, driven by the upgrade and promotion of communication infrastructure by operators [3]