A-shares witness a large-scale signature surge again! Changjin Photonics (688635.SH) opened with a 1193% increase, earning over 244,000 yuan in one signature.

On May 27th, Changjin Photonics (688635.SH) officially landed on the Shanghai Stock Exchange for listing and trading, with an opening price of 530 yuan per share. Calculated at the issue price of 40.98 yuan, it rose by 1193%, with a profit of over 244,000 yuan for each lot. According to the prospectus, Changjin Photonics is a leading domestic special optical fiber manufacturer with high-performance and multi-category special optical fiber research and industrialization capabilities. The company's main product, rare-earth-doped optical fiber, is an important subcategory of special optical fibers, which is a core optical material in the upstream of the laser industry chain. It is the core component of various fiber lasers, fiber amplifiers, and fiber laser radars, widely used in advanced manufacturing, optical communication, measurement and sensing, national defense industry, medical health, scientific research and other fields. In terms of finances, the company achieved operating income of approximately 145 million yuan, 192 million yuan, and 247 million yuan in the years 2023, 2024, and 2025 respectively; during the same period, it recorded net profits of approximately 54.65 million yuan, 75.75 million yuan, and 95.64 million yuan. Opening Securities released a research report stating that 2026 may become the year of large-scale production of 1.6T optical modules, with silicon photonics technology accelerating deployment and potentially becoming the mainstream solution for 1.6T high-speed optical modules. This may drive a significant increase in demand for EML and CW lasers and other optical chips. The "AIDC+unmanned aerial vehicle+DCI" triple resonance may continue to drive demand for optical fiber cables, while multiple new technologies such as OCS/CPO/air-core optical fibers/thin-film lithium niobate/LPO/LRO may converge, potentially nurturing new investment opportunities.