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Core Viewpoint - The photolithography machine concept stocks have shown significant strength in trading, with several companies reaching new highs, indicating a strong market interest in this sector [1] Group 1: Stock Performance - Guanghua Optoelectronics has reached a 20% limit up, continuing to set new highs [1] - Tengjing Technology has increased by approximately 14%, also achieving a new high [1] - Other companies such as Kaimete Gas, Yongxin Optical, and Haili Co. have also hit the limit up [1] - Maolai Optical has risen by about 8%, nearing the historical high of 500 yuan [1] - Yongxin Optical has experienced three consecutive trading days of limit up [1] Group 2: Company Specifics - Yongxin Optical has stated that it has not found any media reports that significantly impact its stock trading price [1] - The company acknowledges being associated with the semiconductor and photolithography machine concepts but clarifies that its main business involves optical microscopes and optical components [1] - The optical components related to photolithography machines account for less than 1% of Yongxin Optical's revenue, indicating it is not a core business and will not significantly affect current performance [1] - The company's business model is characterized by customization, a variety of products, and small batch production, with applications across diverse fields [1]